Works for 868Mhz Sommer TX03 868-4 4020 transmitters. Not compatible with Pearl, Pearl Vibe, Pearl Twin or other models, even if they have the same frequency. Transmitter mode compatible with 868 mhz Sommer 4020V000 4025V000 4026V000 4031V000 4011V000 4035V002. Technical specification: frequency: 868.8 MHz (rolling code), buttons, controls: 4, coding: via radio. Programming type required: Access to the receiver is required. Programming with receiver, motor or opener. 868 MHz frequency replacement remote control for Sommer, not original from Sommer. Manufactured by a third party. 📦 Guaranteed customer service: If you have any problems, do not hesitate to contact us! Our customer service team is here to help you quickly ✅. 🚀 Fast delivery: We process and ship your order as quickly as possible 📬. However, due to exceptional circumstances (holidays, extreme weather, high demand, etc.), a slight delay may occur. In this case, we will keep you informed as soon as possible 📢💌. 💯 Quality guarantee: Your satisfaction is our priority! We are committed to providing you with quality products for a worry-free purchase 💎. Thank you for your trust and support 💕. We look forward to providing you with an exceptional shopping experience! 🎁✨