rockbros kids bike helmet Size:S (48-53cm) *More than 40 riding data

*More than 40 riding data

- track the cadence and speed by earth induction

*智能通知 碼錶同步提醒

and it can detect the vehicles behind even when riding in a curve

rockbros kids bike helmet Size:S (48-53cm) *More than 40 riding dataSize: 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.