Working voltage: DC12V Working frequency: 433MHz Encoding chip: EV1527 (learning code) Number of buttons: 4 buttons (open/close lock) Dimensions: 92mm x 40mm x 15mm Application areas: Remote control switch, anti-theft alarm, remote control door lock, remote control electric rolling shutter door and window, wireless remote control garage door, wireless remote control rolling shutter door, wireless remote control barrier, etc. Color: As shown Material: Plastic Package Contents: 2 x Wireless RF Remote Control Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm. Only the items listed above are included; other products are not included.