1 Pcs Wireless Controller DC Motor Speed Regulator 3.7-24V High Power Drive Module Function description: 1. Pairing method: the learning button on the module once, the indicator light flashes on, any button on the remote control once, and the module flashes after receiving the signal, indicating that the pairing is successful. (Only support the specific remote control shipped by our company, other of remote control need to provide parameters to the customer service to check whether it is compatible.) 2. the learning button 8 times to set the incoming call to open, and it again to turn off the incoming call open function. The factory default is to turn off the incoming call open. 3. the learning button 9 times to clear all the learned remote controls. Working voltage: DC 3.7V~24V Working current: maximum 5A, continuous work for a long time 3A Wiring method: two in and two out size: 26 x 13 x 3.5mm Material: ABS colour: black Package Contents: 1 x module Only the above package content, other products are not included. Note: Light 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.