1. Working voltage: DC12V 2. Working frequency: 433MHz 3. Encoding chip: EV1527 (learning code) 4. Number of buttons: 4 buttons (open/close lock) 5. Volume: 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. Colour:As Shown Material:plastic Package Contents: 2 x wireless RF remote control Only the above package content, other products are not included. 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.