1. Fish ear hook style, fashion and stylish appearance.
2. Perfect driving partner for long-distance driving safety.
3. Remind you not to get to sleep throgh giving an alarm if your heads hung down up to 25 degrees below the horizontal line when you look straight ahead.
4. Easy to use: just hang the reminder in the right ear and turn on the switch, then if your eyes straight ahead, it does not sound, the alarm will ring once your head slighly tilts 25 to 35 degrees.
5. If the angle is too largr but still no sound, reminder can be fine-turning forward 5 to 10 degrees.
6. Please turn off the switch after using. If you do not use it for a long time, please take the baterry out.
7. Power supply: Button cell LR41 x 3 (included)
2. Perfect driving partner for long-distance driving safety.
3. Remind you not to get to sleep throgh giving an alarm if your heads hung down up to 25 degrees below the horizontal line when you look straight ahead.
4. Easy to use: just hang the reminder in the right ear and turn on the switch, then if your eyes straight ahead, it does not sound, the alarm will ring once your head slighly tilts 25 to 35 degrees.
5. If the angle is too largr but still no sound, reminder can be fine-turning forward 5 to 10 degrees.
6. Please turn off the switch after using. If you do not use it for a long time, please take the baterry out.
7. Power supply: Button cell LR41 x 3 (included)