CH+CH-VOL- VOL+MENUMuteSOUNDMUTECALL/HELPSound Controls (Continued)Surround and Mute functionsSurround FunctionSurround effect chip has been employed to form a vivid and real space surround soundeffect.How to use the Mute functionWhen you want to listen to the sound nearby, or when you areanswering the telephone, or talking with your friends, you may usethe mute function.2. Press the volume button orpress the MUTE button again,and the sound will be recovered.1. Press the SOUND button, theSound menu will appear on thescreen.. Press the CH+/- buttons to movethe indicator to " Surround ".. Press the VOL-/+ buttons to turnthe " Surround " function ON.1. Press the MUTE button once, thesound will be eliminated.On Screen DisplayPress the CALL/HELP buttononce, the channel number,color system and sound systemwill display on the screen.VOLUME 20TREBLE 50BASS 50BALANCE 50SURROUND OnPICTSNDFUNCTIMECHNL