- 100% compatible with the Sommer TX03 868-4 4020 handheld transmitter. This remote is designed specifically for this model and will not work with Pearl, Pearl Vibe, Pearl Twin, or other devices, even if they share the same frequency. - Utilizes a rolling code frequency of 868.8 MHz. Please note, it does not function with 433 MHz or other frequencies. This learning type remote must be programmed directly to the engine operator, rather than being copied from another remote. - Offers a working distance of approximately 50 meters in open spaces, ensuring convenient access to your garage door from a distance. - This remote is a learning type, which means it must be programmed directly to the Sommer garage door receiver or motor. Programming is straightforward and akin to your original remote, making it user-friendly while ensuring reliability. - Features a classic design and durable construction, making it an ideal replacement for your lost or damaged remote. Use Scenarios: 1. Easily manage your garage door operations from your driveway, providing a practical solution for busy households. 2. Enhance security and convenience for those who frequently use their garage, allowing for seamless access without the need for traditional keys. 3. Perfect for new homeowners who need a reliable remote for their Sommer garage systems, enabling quick setup and effective control.