Power and Automatic Power Off of sound level Tester
1. Press the POWER button to turn the meter on.
2. Press the POWER button again to turn the meter off.
3. The meter has an automatic power off feature that conserves battery energy. After 10 minutes the meter automatically shuts off.
4. To press and hold the H button to turn the meter on, the auto power off function will be cancelled. and the icon disappears.
