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 just like the original.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, 4035V002Important: Not 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. Please ensure you have access to your receiver/opener before purchase. Disclaimer: Before purchasing, please confirm that your Sommer remote control 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 / Code Set button on the motor. This is typically located under the lamp cover or on the back of the motor. 2. Press and release the Learn / Code Set button once. A light should illuminate. 3. Press the desired button on the transmitter once. The light will turn off. 4. Press the same remote button again; the light on the motor will flash and then turn off, indicating successful programming. 5. Test the remote operation.Color: Black + Red + Silver Material: Plastic + Metal Package Contents: 2 x Remote Control Note: Light reflection and differences in display screens may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.