Sommer 4020 Tx03-868-4 4026 4031 Garage Door Remote Control 868mhz Rolling Code Handheld Transmitter Aperto 4025 4021 Gate Opene From Chuai DuSOMMER 4011 4021 4025 TX02-868-2 4035 4031 4026 TX03-868-2 Garage Door Remote Control 868mhz Gate OpenerCompatible ModelsSOMMER 4026 TX03-868-2SOMMER 4020 TX03-868-4SOMMER 4031SOMMER 4025SOMMER 4011SOMMER 4035APERTO 4025APERTO 4021Not compatible with SOMMER TX55 868Specification1ModelSMG-SOMMER2MaterialMetal and ABS3Buttons : 4 Buttons4Frequency : 868mhz5CodeRolling Code6BatteryCR2032Include Battery)7Type of programming : Programming with the receiverProgrammingThe remote control is the same function as your original remote.it should programming with original receiver according to your original Manual when you get it.1. Locate the Learn / Code Set button on the motor. This is usually under the lamp cover, or on the back of the motor.2. Press the Learn / Code Set button once, then let go. A light should illuminate.3. Press the desired transmitter button once, and the light will go out.4. Press the remote again the the light will flash on the motor and then go out, signifying the remote has been coded. 5. Test the operation of the remote.