This remote is a 4-channel rolling code remote control for Sommer systems. The handheld transmitter features a compact and ergonomic design, offering simple setup and operation. With four channels, it can be programmed to control up to four different Sommer drives.It is a high-quality, durable replacement remote that includes a protective sliding key cover. This remote is designed to pair with your Sommer receiver unit.Compatible with: SOMMER 4026 TX03-868-2, SOMMER 4020 TX03-868-4, SOMMER 4031, SOMMER 4025, SOMMER 4011, SOMMER 4035, APERTO 4025, APERTO 4021, 4020V000, 4025V000, 4026V000, 4031V000, 4011V000, 4035V002Not compatible with: SOMMER TX55 868 Not compatible with Sommer 868 MHz SOMloq2 (Pearl, Pearl Twin, Pearl handheld transmitters)Note: If your remote's LED light is green or yellow, it is not compatible. Access to the receiver is required. Ensure you have access to your receiver or opener before purchase. Before purchasing, confirm that your Sommer remote operates at 868 MHz and has a red LED light.Programming: The remote must be programmed using the receiver according to the manufacturers manual. 1. Locate the Learn or Code Set button on the motor unit, typically found under the lamp cover or on the back of the motor. 2. Press and release the Learn or Code Set button. An indicator light should illuminate. 3. Press the desired button on the remote once; the light will turn off. 4. Press the same remote button again; the motor light will flash and then turn off, indicating successful programming. 5. Test the remote to ensure proper operation.Color: Black, Red, Silver Material: Plastic and Metal Package Contents: 2 x Remote Control Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.