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