Function description: 1. Pairing : Press the learning button on the module once, the indicator light flashes on, press any button on the remote control once, and the module flashes after receiving the signal, indicating the pairing is successful. (Only support the remote control shipped by our company, other of remote control need to parameters to the customer service to check whether it is .)2. Press the learning button 8 to set the incoming call to open, and press it again to turn off the incoming call open function. The factory default is to turn off the incoming call open.3. Press the learning button 9 to clear all the learned remote controls.Working voltage: DC 3.7V~24VWorking current: maximum 5A, continuous work for a long time 3AWiring : two in and two outsize: 26 x 13 x 3.5mmMaterial: ABScolour: blackPackage Contents:1 x module1 x remote control(Garage Door Remote Control)Only the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.