Dell Technology Guide
Page 53
... Support. The ambient light sensor is located on your laptop computer only. The sensor detects available environmental light and automatically increases or decreases the display backlighting to configure multiple monitors, see "Windows Basic" in Bright or LowLight Environments: NOTE: Your laptop computer may not have an ambient light sensor. It does...
... Support. The ambient light sensor is located on your laptop computer only. The sensor detects available environmental light and automatically increases or decreases the display backlighting to configure multiple monitors, see "Windows Basic" in Bright or LowLight Environments: NOTE: Your laptop computer may not have an ambient light sensor. It does...