Prairie Dog 17-992 Inferno Grips and Thumb Warmer Fits 7/8" Snowmobile and ATV Bars Without Throttle Sleeves, Open or Closed Ended Grips are Designed to Maintain a 170 Degree F Transferring the Heat Into Your Hands While the Thumb Warmer Provides 120 Degree F Keeping Your Thumb Warm Single Button E-Z Controller has 5 Preset Heat Settings Changeable by the Touch of a Button Optional Battery Saving Mode Shuts Grips Off if Volts Drop Below 12.5 Kit Comes Complete with Grips, Thumb Warmer, Controller and Wire Harness