Radio Remote Control for Garage Door Opener,Compatible for Chamberlain LiftMaster 4335E,433.92 MHz,T Type of programming: programming with the receiver Button: 1 button Frequency: 433.92 MHz Battery: built-in battery Range: 10m-50m (open space) Compatible models: 4330E(4330EML,G4330E.G4330)4332E(4332EML,G4332E,G4332)4333E(4333EML,G4333E,G4333)4335E(4335EML,HE4331,G4335E,G4335) Access to the receiver is required. Make sure you have access to the receiver/opening before purchasing. How to program? Deleting a code: To delete a code, simply press and hold the learn button or the code button on the receiver until the first light starts to flash slowly and then lights up until another light lights up. This means the code has been deleted. 1. Press the programming button on the motor. The LED will light up. 2. Press the desired button on the remote control. 3. The light on the door opener will flash, confirming successful programming. The door opener will now work when the button on the Colour:Photo Color Material:Plastic Package Contents: 2x Garage door openers 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.