M10/M12/M22: How to Adjust the Volume
How do I adjust the volume on the M10/M12/M22 amplifiers?
The M10, M12, and M22 amplifiers enable you to adjust the incoming ("listening") and outgoing ("speaking") volume. To adjust your listening volume: Use the thumb wheel on the top of the base. To adjust your speaking volume:
- Remove the cover from the amplifier.
- Remove the plastic screwdriver from the bottom of the amplifier.
- Use the screwdriver to turn the volume dial to increase or decrease the volume.