Handlebar hole diameter: for most motorcycles 22mm handlebars. Compatible For motorcycles, scooters, ATVs, sports bikes, electric motorcycles, moped, bicycles, Dirt Bike The function of each button is different, please pay attention to the picture Metal: Aluminum alloy and rubber. Length: Approx. 55cm, waterproof, can also be used in rainy days Latching action button (on/off) for normal lights, hazard lights, fog lights, headlights Voltage 12V, maximum withstand current: 10A Wiring Instructions: Brown wire: - Blue wire:+ Black line: function The function of each button is different, please pay attention to the picture Metal: Aluminum alloy and rubber. Length: Approx. 55cm, waterproof, can also be used in rainy days Latching action button (on/off) for normal lights, hazard lights, fog lights, headlights Voltage 12V, maximum withstand current: 10A Wiring Instructions: Brown wire: - Blue wire:+ Black line: function