rockbros kids bike helmet %E5%85%92%E7%AB%A5%E5%96%AE%E8%BB%8A%E9%A0%AD%E7%9B%94 1 Size:M (53-58cm) can install bike lights or

can install bike lights or sports cameras

*33 hours battery life

Mips technology provides multi-directional rotational motion cushioning to reduce the impact of rotational forces from different angles

*約263米遠射程

-Motor Power: 1500W x2 dual motors

rockbros kids bike helmet %E5%85%92%E7%AB%A5%E5%96%AE%E8%BB%8A%E9%A0%AD%E7%9B%94 1 Size:M (53-58cm) can install bike lights orSize: Adjustable 48 53cm(S) 53 58cm(M) Weight: 365g (S) 390g (M) Material: PC Outer Shell, EPS Anti Shock Foam, Soft Liner inside for sweating absorb. Safety: CE Standard 12 Ventilation holes, Removable jaw parts Size: adjustable from 48 53cm(S) 53 58cm(M) Weight: 365g (S) 390g (M) Material: PC shell, EPS shock absorbing cushioning, inner padded sweat absorbing cushioning Certification: CE safety certification 12 ventilation holes, detachable jaw.