This equipment used in electric model car, and according to the following the information of choice scope configuration. automatically find the center. high-frequency drive system The use of low-resistance field-effect inner tube With forward and backward functions for car, boat Great budget speed control upgrade from mechanical. This equipment used in electric model car, and according to the following the information of choice scope configuration. automatically find the center. high-frequency drive system Great budget speed control upgrade from mechanical. Electrical parameters: support: the nimh nickel cadmium battery 4-6 group (4.8-7.2 V) The Lithium battery 2 group (7.2V) The move by lot current: forward 320 A reverse 240 A Brake 250A The BEC output : 5.6V, 2A Forward Current: 320A Back Current: 240A Voltage range :4.8-8 .4 V PWM Frequency: 1.5KHZ Size: 34 x 34 x 30 mm Material: plastic + metal Weight: 47g Instructions: 1, Battery must be connected properly. at both ends of wiring board, the red wire is positive, black is negative. 2, Turn on the power switch, if no signal is input, this motor will issue a ""beep-beep-beep"" alarm sound. When there is signal, the alarm sound stops. 3, Turn on the remote control, adjust the trimmer to the middle(both red and green light goes out). Push forward the throttle, the rc car will goes foward and the green light turns on. Then pull back the throttle into the brake status. The greater the magnitude of the brake pull back , the more tight it will be. Release the throttle to middle and pull pack again, the red light turns on and the rc car goes backward. Note: This product CANNOT be used in humid environments. Make sure the power is negative not reversed. Packet Content: 2 x 320A ESC Note:Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-1-3cm.