Häfele ER4800 - Audio Settings; Controlling Volume Level and Mute

Application
Sound volume can be controlled by 8 levels. (Mute to maximum level)
How to control volume level
※Press 1 to make maximum level and press 0 to make mute in one time.
Input secret code (Ex : 123456)
or Touch the card key
2 : Volume down
3 : Volume up
Touch the front pad
Press [ ]
Press [ ]
Note
In mute status, numeric lamp is flickering with entering secret code.