Feature:1. This RC motor heat sink is specially designed for 4268-4274 motors of RC model car.2. The RC heat sink with thermal sensor is equipped with 5-10V cooling fan to protect your motor.3. The thermal sensor will accurately detect rising temperature, when the motor is up to 40, the cooling fan will automatically turn on to cool the motor.4. The cooling fan can be powered up from the receiver, convenient and easy to use.5. With high quality material designed clamp shape and exquisite workmanship, the heatsink is durable for long term use.Specification:RC Car Motor Heatsink Cooling Fan with Thermal Sensor CNC Aluminum Alloy Heatsink for 4268 4274 Motors 1/8 1/10 Buggy Cars.Features:This RC motor heat sink is specially designed for 4268-4274 motors of RC model car.The RC heat sink with thermal sensor is equipped with 5-10V cooling fan to protect your motor.The thermal sensor will accurately detect rising temperature, when the motor is up to 40, the cooling fan will automatically turn on to cool the motor.The cooling fan can be powered up from the receiver, convenient and easy to use.With high quality material designed clamp shape and exquisite workmanship, the heatsink is durable for long term use.Specifications:Item name: Heatsink Cooling Fan with Thermal SensorColor: BlackFan input: 5-10VFan size: 40 * 40mmClamp suitable for: 4268-4274 MotorsWeight: 29gPackage information:Package size: 8 * 7 * 5cm / 3.2 * 2.8 * 2inPackage weight: 31g There might be some deviation due to manual measurement.Package list:1 * Heatsink Cooling Fan with Thermal SensorPackage List:1 * Heatsink Cooling Fan with Thermal Sensor