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 with a protective sliding key cover. 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 4035V002 Important: Not compatible with SOMMER TX55 868 or Sommer 868 MHz SOMloq2 (Pearl, Pearl Twin, Pearl handheld transmitters). 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 instructions: 1. Locate the Learn / 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 / Code Set button. An indicator light should illuminate. 3. Press the desired button on the transmitter once. The light will turn off. 4. Press the same transmitter 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 + Metal Package Contents: 2 x Remote Control Note: The package includes only the items listed above. Other products are not included. Light reflection and display differences may cause slight variations between the product color in images and the actual item. Measurement may vary by +/- 1-3 cm.