ROCKBROS USB Rechargeable Bike Light 4 In 1 Multifunctional 130dB Phone Holder Power Bank Waterproof Headlight Bike Accessories

Waterproof: IP 54 It is suitable for the outdoor riding. Built-in 4400mAh battery,mini USB charging interface. Double LED lights with front and flashing light for choosing. Can connect to mobile phone for calling and playing music. Application of mobile phone Android or IOS software. Support AUX input. IP54 waterproof,It is suitable for the outdoor riding. 32bit ARM master platform design and USB software upgrade.