Description:
 * Anti-drowse, anti-doze alarm, driver nap alarm
 * This product is designed to raise drivers' awareness of momentary
    lapses caused by sleepiness and tiredness.
 * Worn behind the right ear, it works on the principle of electronic
    balance.
 * As the driver's head nods below a preset angle, the device omits a
    loud alarm signal alerting the driver to take corrective action.
 * Alarm output: 130dB
 * Composed of alarm unit and drive doze accessory
 * With 3mm white LED torch light
 * 3pcs Button Cell Batteries included