U s i n g t h e h e a d s e t25English■ Adjusting the earphone volumePress the volume up key to increase or the volume downkey to decrease the volume. To adjust the volume quickly,press and hold either of these keys for 2 seconds.■ Muting a callYou can mute or unmute the ongoing call by pressing thepower key briefly.■ Switching the call between phone andheadsetYou can switch the active call between the headset and acompatible Nokia phone.To switch the call from the headset to a phone and viceversa, press and hold the answer/end key for 2 seconds, oruse the respective function in your phone.9236329_HS-21W_1_en.fm Page 25 Monday, November 1, 2004 1:54 P