Activate / deactivate the safety Lock
1. While using your personal portable FM radio, you can lock all the buttons to prevent accidental button presses.
2. To lock your personal portable FM radio buttons, press and hold the HOLD button for 5 seconds.
3. HOLD will be displayed.
4. To unlock your personal portable FM radio buttons, press and hold the HOLD button for 5 seconds.
5. HOLD will disappear.