When working, pleasant awakening sound alerts you when the head nods forward. Function: The innovative and our patent product is designed to lie on one of ears when head-nodding conditions. It works on the principle of electronic balance.When working, a pleasant awakening sound alerts you when the head nods forward that you should not during the highly wholehearted-needed situation. Characters: 1) Weight: 16.5g 2) Size: Length 63mm X Width 47mm X Thickness 15mm 3) Color: Silver gray, yellow, green, red. (Other colors should be ordered in quantity)4) Power: AG5 (1.5V X 2) Battery 5) Alarm Angle: 15 - 30 (Adjustable) 6) Rating for the Voice Pressure: 1 cm away from the voice hole >85DB 7) Patent: Applied for Design Registration (ZL 98 2 27473.4) Logo: There are two different logos engraving on the front of the product, one is logo of our company "Welkin", the other a picture of small Baby Angel. Inner Packing: There are two different packs: Blister pack and Gift box pack. Outer Packing: Carton (Size: 385 X 320 X 305mm) Blister Pack: 250pcs/carton, G.W.6.7kgs, N.W.5.9kgs; Gift box pack: 200pcs/ctn, G.W.11.1kgs, N.W.10.3kgs

driver anti-drowsy alarm wore on ear(logo of Welkinl) in blue