Cover USB in the rain！

Product Detail:

Brand:       ROCKBROS

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

Time:         Mighty   about 4 hours

Low       about 9 hours

Flash     about 24 hours

Only side & rear warning light about 1 month