See also:

Turning on/off the Hands-free mode
Turning on/off the Hands-free mode 1) OFF hook switch 2) ON hook switch 3) Talk switch To turn on the Hands-free mode, press the OFF hook switch . To turn off the Hands-free mode, press the ON hoo ...

Adjustable level of each volume
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Battery
- Before beginning work on or near any battery, be sure to extinguish all cigarettes, matches, and lighters. Never expose a battery to an open flame or electric sparks. Batteries give off ...