Built-in 280 mAh lithium battery, equipped with standard USB charging, 1.2 hours can be filled, the charge can be a continuous bell 2000 times, about 20-30 days normal use.
It is designed to be the mini size of a watch, you can hide in the handle without supporting the operation of handbrake, shift or other.
Waterproof, dustproof and fall-proof, very comfortable for your daily use.