Heat Demon 211056 Motorcycle Grip Heater Kit for Harley with Four-Level Controller, Black Fits all Harley-Davidson models, regardless of handlebar size or throttle type Includes three (3) heater inserts - one throttle side heater for cable throttle applications, one throttle side heater for Fly By Wire applications and one clutch side heater to install inside handlebar Four (4) Level power controller with adjustable intensity LEDs Microprocessor and thermister feedback loop keep the heat at your desired level, regardless of voltage variation or ambient conditions Kit includes everything needed for simple installation