Samsung WEP430 - Manual (Page 15)

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When a call comes in, the headset sounds the ring tone and
flashes the blue indicator twice. Press the Multi-Function
button.
Press [+] on the side of the headset to increase the volume
level and [-] to decrease the volume level.
Press and hold [+] or [-] to switch off the headset's
microphone. To switch it back on, press and hold either one
again.
Answering a call
Do not hold the Multi-Function button down too long
when redialing the last number, ending, or answering a
call. This should only be a quick tap.
Adjusting the volume
At very high volumes, prolonged listening to the
headset can damage your hearing.
Switching on the microphone
WEP430_US.book Page 12 Wednesday, October 10, 2007 5:13 PM