Features:<br />This RC motor heat sink is specially designed for brushless motor 3600series and Brushed motor size of 550/540.<br />The RC heat sink with a thermal sensor is equipped with a 5-10V cooling fan to protect your motor.<br />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.<br />The cooling fan can be powered up from the receiver, convenient, and easy to use.<br />With high-quality material and exquisite workmanship, the heatsink is durable for long term use.<br/>Specification:<br />Item name: Heatsink Cooling Fan with Thermal Sensor<br />Material: Metal, Plastic<br />Color: Golden,Red,Blue,Black (optional)<br />Fan input: 5-10V<br />Fan size: 30 x 30 x 17mm<br />Weight: 24g<br />Suitable for motors: blushless motor 3600series; Brushed motor size of 550/540<br />Package size: 8x7x3.5cm<br />Package weight: 26g<br/>Note: There could be a few deviations due to manual measurement or slightly color difference as the result of the shooting scene. Thank you for your understanding.<br/>Package listing:<br />1 x Heatsink Cooling Fan with Thermal Sensor