Preheating the rubber tyre surface increases the rubber's friction coefficient and enhances its grip on the track surface. Racing for RC hobbyists is made easy! Sky RC Tyre Warmers will definitely give you the advantage of tyre-readiness whenever you roll out onto the track. On the left side of the Tyre Warmer is a jack for the DC connection. To achieve the optimum warm-up effect, the DC power must continuously provide 12V voltage with a current of 8A. XT60 Connector On the right side of the tyre warmer is the generic built-in XT60 connector, which allows powering the tyre warmer with a 4S LiPo battery pack. No adaptors are necessary. Features 1.Dual Power Source: 4S LiPo battery pack and 12-18V DC input. 2.Front & Rear temperature can be set independently 3.Temperature of 4 tires is controlled by MCU 4.Removable front & rear tire warmers 5.Eight different beep tones 6.Minimum temperature 7.Celsius - Fahrenheit selectable display 8.Four LED indicators 9.Safety timer Intuitive User Interface Large LCD Display Screen Four LED indicators Includes tyre warmer unit, 2 pairs of tyre belts, DC input cable with crocodile clips and instructions. (SK-600064-08)