Warm Tip: This garage door remote control is a replacement rather than an original accessory. We recommend you refer to the list below for device compatibility before purchasing. Compatibility List: With a frequency of 433.92 MHz, our garage door remote control only works with Hormann EcoStar RSC2-433, RSZ1-433, and RSE2-433. Compatible with Hormann Liftronic 500/700/800 and Portronic D2500/D5000/S4000 Incompatible models: NOT compatible with Ecostar BS series (RSC4-433-BS, RSZ1-433-BS) AND Liftronic 700 Series 2, Liftronic 800 Series 2. 2 Channels: 2 buttons correspond to 2 independent channels, and each button can control a door opener individually.