Replacement for Hormann EcoStar remote control: RSC2-433 RSE2-433 RSZ1-433 RS4-433 RSM4-433 RSN2-433 Compatible with Liftronic 500/700/800 and Portronic D2500/D5000/S4000. Not compatible with Ecostar BS series, such as RSC4-433-BS, RSZ1-433-BS. Not compatible with Liftronic series 2, e.g. liftronic 500-2, 700-2, 800-2. This remote is a two button handheld remote that can control up to 2 garage door openers. And it is easy to programme, allowing you to quickly complete the setup process.