Plantronics Explorer 390 User Guide - Page 11

Headset Controls Turn on the headset Press and hold the call control button until the indicator glows blue. You will hear ascending tones. Turn off the headset Press and hold the call control button until the indicator glows red. You will hear descending tones. When power is off, the indicator light stays off. Answer a call Tap the call control button. When you receive a call, your phone may ring before your headset rings. Wait until you hear the ring in your headset before you press the call control button to answer the call. Reject a call When phone rings, press and hold the call control button until you hear a single low note. Make a call Enter number on your phone, press send, and the call is automatically transferred to headset. There is no need to press the call control button. Adjust the volume Tap the volume button to increase volume. At the upper limit you will hear two tones. Press again for the lowest volume level. (There are five volume levels.) WARNING: Do not use headphones/headsets at high volumes for an extended period of time. Doing so can cause hearing loss. Always listen at moderate levels. See www.plantronics.com/ healthandsafety for more information on headsets and hearing. 7