Oppo A51F Manual page 2

Functions of components
1. Front camera; 2. Light sensor&infrared sensor; 3. Volume button; 4. Power button; 5. Menu key
6. Home Key; 7. Return key.
Light sensor: This component will automatically detect the light intensity and adjust the screen
brightness according to the light intensity for your convenience.
Infrared sensor: This component will automatically detect the distance between the body and the phone
during calls.If the body is close to the phone, the screen will be turned off to avoid enabling other
functions.This function is not available when you are calling via earphone and during hands-free mode.
Volume button: This component is used to adjust the volume. The volume will be increased when you
press the upper part and decreased when you press the lower part.
Power button: Press the button for a while to switch on/off; Press the button to lock the screen (except
for incoming call interface and call interface).
Home Key: Press home key to run the app in background when it is running; Press the key to return to the
home screen from other pages.