On models with multiple channels, use the channel selector knob or buttons to find your designated frequency. Operating Instructions
Charging Procedure - Motorola Solutions Documentation Portal Instruction Manual For Motorola Radius Sp10
Continue rotating the same knob clockwise to increase the volume or counter-clockwise to decrease it. On models with multiple channels, use the channel
The Radius SP10 is designed for simplicity. For the best results, hold the radio 1 to 2 inches away from your mouth when speaking. On models with multiple channels
Rotate the On/Off Volume Control Knob clockwise until you hear a click.