General description The Garage Remote Control Replacement for Sommer 4020 TX03 868-4 is designed for seamless compatibility with Sommer TX03 868-4 transmitters. This remote control operates on a frequency of 868 MHz and features a rolling code for enhanced security. It is capable of controlling up to four garage doors, making it a versatile addition to your home improvement toolkit. Technical specifications Frequency: 868.8 MHz (rolling code) Buttons: 4 Coding: via radio Compatibility and accessories Compatible with Sommer TX03 868-4, 4020, 4020V000, 4025V000, 4026V000, 4031V000, 4011V000, 4035V002 Not compatible with Pearl, Pearl Vibe, Pearl Twin, or other models even if the frequency is the same Requires a receiver, motor, or opener for programming Usage Enjoy a stable connection with strong signal penetration, allowing your garage door to respond quickly whether you are inside or outside. The remote control simplifies operations, enabling you to fine-tune the opening height or