Sports Protective Gear, 12 Holes Adjustable Head Circumference with Front Lighting and Back Warning Light.

1. Impact-resistant integrated PC shell, wear-resistant, fall-resistant, and higher safety factor
2. 12 holes for heat dissipation and ventilation, which are convenient for exhausting the heat and moisture in the helmet
3. Adjustable head circumference, you can adjust the helmet according to your head size
4. 750mAh battery capacity, can last 10h
5. The design of front lighting and back warning lights makes night riding safer

SIZE	S: 48-53cm （18.8-20.8inches）head circumference
	M: 54-57cm （21.2-22.4inches）head circumference
	L: 58-61cm （22.8-24inches）head circumference
Charging time	2.5 hours
Standby time	160 days
Working time	more than 8 hours (the most power-consuming mode)
General	Material: EPS + PC
General	Suitable for: Electric skateboard, Electric Bicycle, Mountain Bicycle, Road Bike, Touring Bicycle
Dimensions and Weight	Product weight: 0.3600 kg
	Package Weight: 0.4500 kg
	Package size (L x W x H): 20.00 x 20.00 x 18.00 cm
	7.87 x 7.87 x 7.09 inches
Package Contents	Package Contents: 1 x Bike Helmet