Powerlet RapidFIRe Heated Glove Liner - No Temperature Controller A temperature controller (not an on/off switch) is REQUIRED (and sold separately) for these glove liners. The liners have the potential to get hot enough to cause burns if they are used without a temperature controller. With over 18 watts of heat in each glove, cold hands are a thing of the past. Using Far Infrared technology, these ultra thin liners provide pleasing penetrating heat around the fingers as well as over the back of the hand. Must be used with a controller. Stay Warm While Riding Designed for commuting, touring and extending your riding season, Powerlet heated gloves will provide years of pleasure. Style, comfort, protection, and warmth. Perfect. Performance Guarantee Every heated glove goes through our multi-point inspection process before earning the privilege of carrying the Powerlet name. We inspect internal wiring, connectors, bench meter amperage and resistance testing before labeling and packaging our gloves. Details matter we believe in delivering you the highest quality product for your hard-earned money. Low Power Alternative Perfect for all motorcycles, even those without much excess electrical capacity to power appliances. Glove liners are rated at 36 watts per pair. Stay warm and stay safe while minimizing your electrical consumption.