... alarm device can wake you up, save your life, the lives of your passengers, and others on the road (not ... vehicle repair) , Nap alarm ( anti drowse alarm) is a unique wireless device that has been developed to ... on/off button in on position.2. Test that is is working properly by tilting it forward , if it ... vibrates/sounds then it is a working state.3. Place behind your right ear and adjust, it ...