Power Source: Battery Power Supply: Battery Brand Name: BIKEONO Model Number: BIKEONO-1 Support Dimmer: 2 - 4 Files High-concerned chemical: none Body Material: Aluminum alloy Mounting Placement: Handlebar Waterproof Level: IPX5 Origin: Mainland China Certification: CE Certification: FCC Certification: RoHS Intelligent sensing: N Choice: yes semi_Choice: yes