ROCKBROS Front/Side/Rear Warnig Light Cycling Helmet Breathable Vents Mountain Road Bicycle Helmet - Black

• Integrated flow vents to reduce head temperature and resistance, will always keep you cool and dry when riding

• Front warning + side warning + rear warning light, more secure at night

• Equipped with an adjustable clasp, free to adjust the head circumference to fit your head

• Detachable integrated-molded lining for easy cleaning

Specification:

• Power: USB charging

• Battery: 2000mAh

• Time: (Mighty)about 4 hours; (Low)about 9 hours; (Flash)about 24 hours; (Only side & rear warning light) about 1 month

• Head circumference: 57-62cm