Product name:Waterproof 6-12 V Brushed Motor Speed Controller 320A Esc Brushed Motor Speed Controller ESC RC Car Boat black Size - Size: 43mm (long) X 29mm (width) X 27mm (height). (including heat sink part). Feature - Automatically finds the center position, high frequency transmission system, the low resistance of the field effect tube. Application - applies to cars, model boat models Noted - This electric modulation, with 3S (12V), can only take less than 380 of the motor. With 2S (8.4V), only with no more than 540 motor. . Description: 100% Brand new and high quality Dimensions: 43mm x 29mm x 27mm Working Voltage: 6 - 12V BEC Current: 5.6V/2A Internal Resistance: 0.0076m ohm Continuous Output Current: 320A (Forward), 160A (Backward) Cable Type: 16 AWG (Battery & Motor) Cable Length: 140mm (Battery & Motor), 450mm (Receiver) Input Battery Types: NiCd/ Nimh/ Li-po battery Recommend Model: Ship / Car Weight:48g Package Include: 1 * Controller How to Use? 1. Connects to the battery power properly, the red wires at both ends of this board set are positive, the blacks are negative. (or connect to a standard DC plug socket / T plug / banana plug). 2. the output of red and black lines of ESC need to be connected to the red and black lines of car 540 motor. 3. about the ESC switch, then the engine produces a "beep" sound, and then turn on the power of the transmitter, the motor will produce a "duo-la-mi" sound that proves that the remote control signal and ESC have successfully connected.