Features:Easy to use, the 4 channel remote control system lets you take control of your gadgets, car, home and garage.The battery used in the product is 27A 12V please replace the battery when the remote control distance is insufficient.With this remote control, you can control all 433MHz fixed code for key fobs.4-Channel RF Wireless Remote Control Duplicator for Cars, Garage Doors, Gate Doors, Alarm Systems etc.This is a fixed frequency remote cloner (433mhz) for copying common fixed and learning code remote controls. Specifications:Material:ABS,MetalWorking current: 10mARadiation power: 10mwTransmission frequency: 433MHZTransmission distance: 50-100M (open area, the sensitivity of the receiving device is negative 100dbm)Encoder type: fixed code. learning codeColor: ABCD button/switch lock button/number 1234/up and down buttonsFunction: copy remote control/test remote control/copy remote controlSize:Approx.5.42.91.4cm/2.13x1.14x0.55in