It will only work with twist grips throttles Suitable for 12V DC application Suitable for most of motorcycles with 22mm(7/8inch) diameter handlebar Energy-efficient, Ultra-thin electric hand dedicated switch Advanced electronic thermostat system does not consume power, Helps to protect the battery Product description Specifications: Color: Black Power: 12w-24w (Adjustable) Red Line: DC+12 cathodes Black Line: DC -12 anode Length:127mm(Right)/143mm(Left) Inner Diameter: 22mm / 7/8″ About the Wiring: Red wire – positive, black wire-negative (can not reversed) Fitment: It will only work with twist grips throttles,it will not work on ATV Installation instructions : 1. Tear Down the Primitive Handlebar and Load the Electric One 2. As for Electric Power Line,Red Line Connect the Positive,Black Line Connect the Negative (Can’t meet, Otherwise Temperature Cannot Adjust) 3. Before Opening and Closing, Push it to Increase the Temperature. Retreat is to re