Quick Guide CX 400BT True Wireless
Page 2
Press the button to view the battery charge status. Lade-Status Setzen Sie die Ohrhörer in die Ladebox. www.sennheiser.com/download Instruction manuals and product support | Bedienungsanleitungen und Produktbetreuung CX 400BT True Wireless Welcome Willkommen | 欢迎 Quick Guide | Kurzanleitung Model: CX400TW1, CX400TW1 R, CX400TW1 L, CX400TW1 C Drücken Sie die Taste, um den AkkuLadestand anzuzeigen. ? 6 Touch control | Touch-Bedienfläche 1x Play/Pause | Wiedergabe...
Press the button to view the battery charge status. Lade-Status Setzen Sie die Ohrhörer in die Ladebox. www.sennheiser.com/download Instruction manuals and product support | Bedienungsanleitungen und Produktbetreuung CX 400BT True Wireless Welcome Willkommen | 欢迎 Quick Guide | Kurzanleitung Model: CX400TW1, CX400TW1 R, CX400TW1 L, CX400TW1 C Drücken Sie die Taste, um den AkkuLadestand anzuzeigen. ? 6 Touch control | Touch-Bedienfläche 1x Play/Pause | Wiedergabe...
Instruction manual CX 400BT True Wireless
Page 1
CX 400BT True Wireless True wireless stereo earphones Model: CX400TW1, CX400TW1 R, CX400TW1 L, CX400TW1 C Instruction manual Use the search function, the navigation (left) or the following links: Start "Product overview" "Getting started" "Using the earphones" "FAQ/If a problem occurs ..." KG Am Labor 1 30900 Wedemark Germany www.sennheiser.com Version: 11/20 A03 "Specifications" Sennheiser electronic GmbH & Co.
CX 400BT True Wireless True wireless stereo earphones Model: CX400TW1, CX400TW1 R, CX400TW1 L, CX400TW1 C Instruction manual Use the search function, the navigation (left) or the following links: Start "Product overview" "Getting started" "Using the earphones" "FAQ/If a problem occurs ..." KG Am Labor 1 30900 Wedemark Germany www.sennheiser.com Version: 11/20 A03 "Specifications" Sennheiser electronic GmbH & Co.
Instruction manual CX 400BT True Wireless
Page 2
... using the product. ▷ Always include this instruction manual when passing the product on to extreme tem- Permanent hearing damage may occur when headphones are used at high volume levels for Lithium rechargeable batteries WARNING If abused or misused, the rechargeable batteries may even present a risk of: • explosion, • fire development, • heat generation, • smoke or gas development. 2 | CX 400BT True Wireless...
... using the product. ▷ Always include this instruction manual when passing the product on to extreme tem- Permanent hearing damage may occur when headphones are used at high volume levels for Lithium rechargeable batteries WARNING If abused or misused, the rechargeable batteries may even present a risk of: • explosion, • fire development, • heat generation, • smoke or gas development. 2 | CX 400BT True Wireless...
Instruction manual CX 400BT True Wireless
Page 3
Switch rechargeable battery-powered products off after use /Liability These headphones have been designed as an accessory for Bluetooth compliant devices. If the device on firmware updates This product stores individual settings such as the volume, the sound profiles and the Bluetooth connection data of connection due to be transferred and processed, do not throw the product / rechargeable batteries into operation, please observe the respective country-specific regulations. Using the "Sennheiser Smart Control" app, you do...
Switch rechargeable battery-powered products off after use /Liability These headphones have been designed as an accessory for Bluetooth compliant devices. If the device on firmware updates This product stores individual settings such as the volume, the sound profiles and the Bluetooth connection data of connection due to be transferred and processed, do not throw the product / rechargeable batteries into operation, please observe the respective country-specific regulations. Using the "Sennheiser Smart Control" app, you do...
Instruction manual CX 400BT True Wireless
Page 4
... Sennheiser partner: www.sennheiser.com > "Service & Support". 4 | CX 400BT True Wireless Package contents Package contents Earbud R for right ear (CX400TW1 R) and earbud L for left ear (CX400TW1 L) Charging case with built-in rechargeable battery for the earbuds (CX400TW1 C) USB charging cable with USB-C and USB-A connector, approx. 0.25 m Silicone ear adapters (size XS, S, M (pre-mounted to the earbuds) and L) Quick guide Safety guide Online you can find: • this detailed instruction manual and additional information (www.sennheiser.com/download) • the Sennheiser Smart Control...
... Sennheiser partner: www.sennheiser.com > "Service & Support". 4 | CX 400BT True Wireless Package contents Package contents Earbud R for right ear (CX400TW1 R) and earbud L for left ear (CX400TW1 L) Charging case with built-in rechargeable battery for the earbuds (CX400TW1 C) USB charging cable with USB-C and USB-A connector, approx. 0.25 m Silicone ear adapters (size XS, S, M (pre-mounted to the earbuds) and L) Quick guide Safety guide Online you can find: • this detailed instruction manual and additional information (www.sennheiser.com/download) • the Sennheiser Smart Control...
Instruction manual CX 400BT True Wireless
Page 5
Product overview Product overview Charging case CX400TW1 C 6 12 3 4 5 7 8 9 7 LED displays the charging process/charge status of the rechargeable battery of the charging case or of the earbuds (when inserted into the charging case) Input for USB-C connector for charging the rechargeable batteries LED button activates the LED display for 5 seconds Built-in rechargeable battery for charging the earbuds on the go Type plate Charging compartment for the left earbud L Magnetic holders Charging compartment for the right earbud R Charging contacts CX 400BT True Wireless | 5
Product overview Product overview Charging case CX400TW1 C 6 12 3 4 5 7 8 9 7 LED displays the charging process/charge status of the rechargeable battery of the charging case or of the earbuds (when inserted into the charging case) Input for USB-C connector for charging the rechargeable batteries LED button activates the LED display for 5 seconds Built-in rechargeable battery for charging the earbuds on the go Type plate Charging compartment for the left earbud L Magnetic holders Charging compartment for the right earbud R Charging contacts CX 400BT True Wireless | 5
Instruction manual CX 400BT True Wireless
Page 6
Product overview Earphones CX400TW1 R and CX400TW1 L Touch control panel Changeable silicone ear adapters Left earbud L (secondary earbud, receives signals from the right earbud) Status LED Magnetic holders Charging contacts Microphones for phone calls Right earbud R (primary earbud, controls the Bluetooth connection to the smartphone and to the left earbud) Openings for acoustic optimization Built-in rechargeable battery 6 | CX 400BT True Wireless
Product overview Earphones CX400TW1 R and CX400TW1 L Touch control panel Changeable silicone ear adapters Left earbud L (secondary earbud, receives signals from the right earbud) Status LED Magnetic holders Charging contacts Microphones for phone calls Right earbud R (primary earbud, controls the Bluetooth connection to the smartphone and to the left earbud) Openings for acoustic optimization Built-in rechargeable battery 6 | CX 400BT True Wireless
Instruction manual CX 400BT True Wireless
Page 7
... displays the charging process: LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted pulses yellow ... Product overview Overview of the LED indications of the charging case When a USB cable is fully charged flashes red ... charging case is connected, the LED of the charging case displays the battery charge status or the charging process of the earbuds for 5 seconds: CX 400BT True Wireless | 7 earbuds and charging case are fully charged ... earbuds and charging case are being charged lights up green ... a charging error/ battery error has been...
... displays the charging process: LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted pulses yellow ... Product overview Overview of the LED indications of the charging case When a USB cable is fully charged flashes red ... charging case is connected, the LED of the charging case displays the battery charge status or the charging process of the earbuds for 5 seconds: CX 400BT True Wireless | 7 earbuds and charging case are fully charged ... earbuds and charging case are being charged lights up green ... a charging error/ battery error has been...
Instruction manual CX 400BT True Wireless
Page 8
...: • Clean the contacts on the earbuds and in at least one earbud (> 30) ... Product overview LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted lights up red ... charging case is charged less than 90 % lights up green ... tery of the earbuds and the charging case until the LED lights up yellow ... Overview of the LED indications of the charging case is fully charged pulses yellow ... earbuds are empty ... rechargeable battery of the earbuds 8 | CX 400BT True Wireless
...: • Clean the contacts on the earbuds and in at least one earbud (> 30) ... Product overview LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted lights up red ... charging case is charged less than 90 % lights up green ... tery of the earbuds and the charging case until the LED lights up yellow ... Overview of the LED indications of the charging case is fully charged pulses yellow ... earbuds are empty ... rechargeable battery of the earbuds 8 | CX 400BT True Wireless
Instruction manual CX 400BT True Wireless
Page 9
..." "Power off ... not connected via Bluetooth ... Bluetooth pairing not successful CX 400BT True Wireless | 9 Bluetooth pairing or earbud pairing successful flashes red 3x ... are in earbud pairing mode (to pair the right and left earbud) Notes on ... system error - Perform a restart (> 31) flashes redgreen for approx. 1 ... are not connected to a device via Bluetooth (primary earbud (R) is connected to the smartphone, secondary earbud (L) is not connected to the primary earbud (R)) lights up blue ... rechargeable battery is almost empty flashes red slowly ... switch off...
..." "Power off ... not connected via Bluetooth ... Bluetooth pairing not successful CX 400BT True Wireless | 9 Bluetooth pairing or earbud pairing successful flashes red 3x ... are in earbud pairing mode (to pair the right and left earbud) Notes on ... system error - Perform a restart (> 31) flashes redgreen for approx. 1 ... are not connected to a device via Bluetooth (primary earbud (R) is connected to the smartphone, secondary earbud (L) is not connected to the primary earbud (R)) lights up blue ... rechargeable battery is almost empty flashes red slowly ... switch off...
Instruction manual CX 400BT True Wireless
Page 10
Rechargeable battery is almost empty. Product overview Voice prompt "Recharge headset" "Call rejected" "Call ended" "Volume min" "Volume max" Meaning/earbuds... ... incoming call ended ... volume set to maximum 10 | CX 400BT True Wireless call rejected ... volume set to minimum ... Recharge the rechargeable battery. ...
Rechargeable battery is almost empty. Product overview Voice prompt "Recharge headset" "Call rejected" "Call ended" "Volume min" "Volume max" Meaning/earbuds... ... incoming call ended ... volume set to maximum 10 | CX 400BT True Wireless call rejected ... volume set to minimum ... Recharge the rechargeable battery. ...
Instruction manual CX 400BT True Wireless
Page 11
.... CX 400BT True Wireless | 11 Selecting suitable ear adapters for optimum fit of the earbuds XS S M L L R The perceived sound quality including bass performance and the best possible noise cancellation of the earbuds and the charging case are being charged. Getting started Getting started 1. The earbuds and the charging case are woken up the earbuds and the charging case and charging the rechargeable batteries L R USB-C USB-A Upon delivery, the rechargeable batteries of the earphones depends to be used...
.... CX 400BT True Wireless | 11 Selecting suitable ear adapters for optimum fit of the earbuds XS S M L L R The perceived sound quality including bass performance and the best possible noise cancellation of the earbuds and the charging case are being charged. Getting started Getting started 1. The earbuds and the charging case are woken up the earbuds and the charging case and charging the rechargeable batteries L R USB-C USB-A Upon delivery, the rechargeable batteries of the earphones depends to be used...
Instruction manual CX 400BT True Wireless
Page 12
... earbuds at a slight angle into the ears and twist them slightly into the ear canal so that they sit comfortably and snugly in the ear canal. 3. Installing the Smart Control app on your smartphone "Sennheiser Smart Control" The Sennheiser Smart Control app allows you to use all functions and settings of the earphones and to your liking using the equalizer (> 19). 12 | CX 400BT True Wireless adjust the sound...
... earbuds at a slight angle into the ears and twist them slightly into the ear canal so that they sit comfortably and snugly in the ear canal. 3. Installing the Smart Control app on your smartphone "Sennheiser Smart Control" The Sennheiser Smart Control app allows you to use all functions and settings of the earphones and to your liking using the equalizer (> 19). 12 | CX 400BT True Wireless adjust the sound...
Instruction manual CX 400BT True Wireless
Page 13
... the earbuds ("Recharge headset"). The quick charge function gives you to the charging case, the rechargeable battery of the earbuds drops to a critical level, a voice prompt asks you to a power source once. When the battery charge of the charging case is also connected to store the earbuds safely at the same time. CX 400BT True Wireless | 13 A complete charging cycle of the charging case displays the charge status (> 7). Sennheiser recommends using for charging the headphones. When the earbuds are...
... the earbuds ("Recharge headset"). The quick charge function gives you to the charging case, the rechargeable battery of the earbuds drops to a critical level, a voice prompt asks you to a power source once. When the battery charge of the charging case is also connected to store the earbuds safely at the same time. CX 400BT True Wireless | 13 A complete charging cycle of the charging case displays the charge status (> 7). Sennheiser recommends using for charging the headphones. When the earbuds are...
Instruction manual CX 400BT True Wireless
Page 14
...CX 400BT True Wireless Connect the USB-A connector to a corresponding socket of the charging case displays the charge status: LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted pulses yellow ... The LED of a USB power source (to be ordered separately). charging case is fully charged flashes red ... The earbuds are being charged lights up green ... earbuds and charging case are magnetically pulled into the right charging compartment. a charging error/ battery error has been detected in at least one earbud (> 30) ... Open the charging...
...CX 400BT True Wireless Connect the USB-A connector to a corresponding socket of the charging case displays the charge status: LED Charging case WITH earbuds inserted Charging case WITHOUT earbuds inserted pulses yellow ... The LED of a USB power source (to be ordered separately). charging case is fully charged flashes red ... The earbuds are being charged lights up green ... earbuds and charging case are magnetically pulled into the right charging compartment. a charging error/ battery error has been detected in at least one earbud (> 30) ... Open the charging...
Instruction manual CX 400BT True Wireless
Page 17
... earphones. Take both earbuds out of Bluetooth devices paired with the Smart Control app installed and the earphones remains active (only Bluetooth Low Energy for other upon delivery. CX 400BT True Wireless | 17 The list of the charging case and make sure that the desired device is switched on your Bluetooth device or delete "CX 400BT TW" from the list of paired devices in bold). Make sure that the right and the left earbud (> 14). 3. The Bluetooth audio connection between the device...
... earphones. Take both earbuds out of Bluetooth devices paired with the Smart Control app installed and the earphones remains active (only Bluetooth Low Energy for other upon delivery. CX 400BT True Wireless | 17 The list of the charging case and make sure that the desired device is switched on your Bluetooth device or delete "CX 400BT TW" from the list of paired devices in bold). Make sure that the right and the left earbud (> 14). 3. The Bluetooth audio connection between the device...
Instruction manual CX 400BT True Wireless
Page 19
... make full use of all available settings and functions. The Smart Control app recognizes the earphones and activates all the settings and functions of your smartphone. CX 400BT True Wireless | 19 If you can use the earphones for 3 seconds to have the free Sennheiser Smart Control app installed on your smartphone (Bluetooth name "CX 400BT TW") (> 16). Alternatively, you connect the earphones via the Bluetooth menu of the headphones, you need to accept the Bluetooth Low...
... make full use of all available settings and functions. The Smart Control app recognizes the earphones and activates all the settings and functions of your smartphone. CX 400BT True Wireless | 19 If you can use the earphones for 3 seconds to have the free Sennheiser Smart Control app installed on your smartphone (Bluetooth name "CX 400BT TW") (> 16). Alternatively, you connect the earphones via the Bluetooth menu of the headphones, you need to accept the Bluetooth Low...
Instruction manual CX 400BT True Wireless
Page 29
... them back on the earbuds. ▷ Clean the charging contacts on the earbuds and in the charging case from time to time. L Replacing the ear adapters For reasons of hygiene, you should replace your Sennheiser partner. 1. Ensure that it locks into place. XS S M L Click CX 400BT True Wireless | 29 Spare ear adapters are available from the product. ▷ Do not use any solvents or cleansing agents. ▷ Clean the product only with a soft...
... them back on the earbuds. ▷ Clean the charging contacts on the earbuds and in the charging case from time to time. L Replacing the ear adapters For reasons of hygiene, you should replace your Sennheiser partner. 1. Ensure that it locks into place. XS S M L Click CX 400BT True Wireless | 29 Spare ear adapters are available from the product. ▷ Do not use any solvents or cleansing agents. ▷ Clean the product only with a soft...
Instruction manual CX 400BT True Wireless
Page 30
... battery is obviously defective or if a charging error/battery error is displayed (> 7), stop using the Sennheiser Smart Control app. ▷ Connect your earphones to your smartphone and start the Smart Control app (> 19). ▷ The app provides information on available firmware updates and guides you suspect that the rechargeable batteries perform at their optimum upon purchase or within the warranty period, you through the installation process. 30 | CX 400BT True Wireless...
... battery is obviously defective or if a charging error/battery error is displayed (> 7), stop using the Sennheiser Smart Control app. ▷ Connect your earphones to your smartphone and start the Smart Control app (> 19). ▷ The app provides information on available firmware updates and guides you suspect that the rechargeable batteries perform at their optimum upon purchase or within the warranty period, you through the installation process. 30 | CX 400BT True Wireless...
Instruction manual CX 400BT True Wireless
Page 31
... in the Bluetooth transmission range of frequently asked questions (FAQ) Visit the CX 400BT True Wireless product page at www.sennheiser.com > "Service & Support". The reset of the smartphone, the sound quality deteriorates increasingly until you insert the earbuds into the charging case and touch and hold the right and the left earbud (secondary earbud) cannot be used alone because it requires the right earbud for 5 seconds. FAQ/If a problem occurs ...
... in the Bluetooth transmission range of frequently asked questions (FAQ) Visit the CX 400BT True Wireless product page at www.sennheiser.com > "Service & Support". The reset of the smartphone, the sound quality deteriorates increasingly until you insert the earbuds into the charging case and touch and hold the right and the left earbud (secondary earbud) cannot be used alone because it requires the right earbud for 5 seconds. FAQ/If a problem occurs ...
