Safety Driving Anti-Sleep Alarm - Black (3 x LR41)
Color: Black - Rated sound level: 110dB - Warning tilted angle: 15~20 degree - The driver is wearing on ear while drowsiness head tilted forward the device will issue a warning causing the driver to wake up thus avoiding the occurrence of traffic accidents - Powered by 3 x LR41 cells (included) - Great for safety driving