Commodity: X5 Rear bicycle light Detecting: day/night detecting, when day power offf auto, when night power on auto Waterproof:IPX4 Water resistant Control: Wireless remote(R/C) control Light:Two color led light(Laser / Streamlined Light) battery: rechargeable ,charge 4 hours ,use 8-12 hours Certification:CE,ROHS,FCC,etc Type:Bike Rear light Other: cycling accessories Flash Mode: 6 modes For Mountain bike,Road bike,etc This bicycle rear light turn signal light smart rear light product is designed and produced by our factory. You are welcome to customizing , we also accept OEM/ODM smart bicycle accessories like helmet and E-bike computer .