The hand-held transmitter features a compact and convenient design, offering simple setup and operation. With four channels, it can be programmed to control up to four different Sommer drives. This high-quality, durable replacement includes a protective sliding key cover. This remote is compatible with Sommer receiver units, replacing your old remote seamlessly. Compatible with: SOMMER 4011, 4020, 4021, 4025, 4026, 4031, 4035. Important: Not compatible with Sommer 868 MHz SOMloq2 (Pearl, Pearl Twin, Pearl hand-held transmitters). Not compatible with SOMMER TX55 868. Note: If your old remotes LED light is green or yellow, this remote is not compatible. Access to the receiver is required. Ensure you have access to your receiver or opener before purchase. Disclaimer: Before purchasing, confirm that your Sommer remote operates at 868 MHz and has a red LED light. Programming: This remote performs the same functions as your original. Programming must be done using your existing receiver and the original manual instructions. 1. Locate the Learn/Code Set button on the motor, typically found under the lamp cover or on the back of the unit. 2. Press and release the Learn/Code Set button. A light should illuminate. 3. Press the desired button on the transmitter once; the light will turn off. 4. Press the remote button againthe light on the motor will flash and then turn off, indicating successful programming. 5. Test the remote to confirm proper operation. Color: Black & Silver Material: Plastic + Metal Package Contents: 1 x Remote Control Note: Light reflection and differences in display screens may cause slight color variations between the product image and the actual item. Measurement may vary by +/- 1-3 cm.