Motorola Radius P210 Manual Updated Link < HD >

The top knob turns the radio on and adjusts audio levels.

A smaller button located above the PTT button allows you to "open" the squelch to monitor a channel before transmitting, ensuring you aren't interrupting another user. Repeater Builder® Status Indicators Solid Red LED: The radio is currently transmitting. Flashing Red LED: motorola radius p210 manual updated

The P210 is an analog, conventional (non-trunking), field-programmable radio. It does not receive firmware updates via USB, nor does it support digital modes. Therefore, an "updated" manual from Motorola would contain zero new operational features. The top knob turns the radio on and adjusts audio levels