Basic Operations - 3M WORKTUNES Manual Del Usuario

Basic Operations

Installing Batteries:
Install two 1.5V AA batteries as shown.
Close battery door until it clicks.
Note:
- Do not mix old and new batteries.
- Do not mix alkaline, standard or
rechargeable batteries.
4
Power and Volume:
Press and hold the On/Off/Volume
button for 2 seconds to power hearing
protector. Turn the knob to adjust the
volume up or down.