TravelMate 4520/4220, Extensa 4420/4120 Service Guide
Page 129
...speakers T One 2.5W subwoofer Two built-in stereo microphones T Intel HD Audio (integrated in the Intel ICH7-M) T Dolby SurroundSound T Dolby Home Theater T S/PDIF T MS-Sound USB Interface Item USB controller USB specification Number of USB port Specification Integrated in the Intel ICH7-M 2.0 4 (two each on the left and... numeric keypad T Inverted "T" cursor keys, 12 function keys, Windows® key, independent US and Euro dollar sign keys, and hotkey controls T Acer MediaTouch keys: play/pause, stop, previous, next, and record keys T Easy-launch keys: WLAN, Internet, email, Bluetooth...
...speakers T One 2.5W subwoofer Two built-in stereo microphones T Intel HD Audio (integrated in the Intel ICH7-M) T Dolby SurroundSound T Dolby Home Theater T S/PDIF T MS-Sound USB Interface Item USB controller USB specification Number of USB port Specification Integrated in the Intel ICH7-M 2.0 4 (two each on the left and... numeric keypad T Inverted "T" cursor keys, 12 function keys, Windows® key, independent US and Euro dollar sign keys, and hotkey controls T Acer MediaTouch keys: play/pause, stop, previous, next, and record keys T Easy-launch keys: WLAN, Internet, email, Bluetooth...