` Powerful alarm beep
` Work on the study of human body balance
` Easy to use and comfortable to wear for a long time
` Just switch on the on-off, place it correctly behind ear then it will work
` Especially suitable for long-distance driving or night driving
` Powered by four AG3 button cell batteries (included)
` Ergonomic Design - fits around back of ear
` Wear on a ear, when your head nods forward in the degrees of 15 to 20 Centigrade , an electronic position sensor will emit a loud alarm
to instantly wake you and your passengers.
` An anti-sleep alarm designed to raise drivers awareness of momently lapses caused by sleepiness and tiredness.
` A perfect choice for people who need to be on full alert while on duty such as security guards, machine operation and even students
who need to work on their posture.
` New in original retail package.
` Size: 5 X 6 X 1.5cm/ 1.97 X 2.36 X 0.59in
` Material: ABS
` Quantity: 1pcs