SPECIFICATIONS:

Name: Light helmet, Cycling Helmet, Bike Helmet, Bicycle helmet

Power: USB charging

Feature: Ultralight, Integrally-molded, Insect net helmet

Function: Waterproof, Shockproof, Safety

Battery:2000 Milliampere

Size: 57 - 62 cm

Time:   

Mighty   can last up to 4 hours

Low       can last up to 9 hours

Flash     can last up to 24 hours

Only side & rear warning light can last up to 1 month

TIPS: Cover USB in the rain