If this function is switched on, the device monitors for user proximity when in the idle state.

Sets the proximity sensor's sensitivity.

The slider sets the distance after which the device reacts to movement and gestures. The further the slider is to the right, the greater the sensor's sensitivity.

Sets the brightness of the illuminated keypad if "Manually" mode is selected.

Use a preset brightness.

Adjusts the keypad brightness to suit ambient light conditions. The brighter the ambient light, the brighter the keypad brightness. Conversely, the darker the ambient light, the darker the keypad brightness. If the ambient light is very bright, the keypad brightness is switched off.