Smart Replacement: This garage door opener remote is designed to operate at 433.92 MHz and serves as a replacement for compatible models. It is not an original equipment product. Universal Compatibility: Compatible with handheld transmitters RSC2, RSE2, Liftronic 500, Liftronic 700, and Liftronic 800 series. Not compatible with Liftronic 700 Series 2, Liftronic 800 Series 2, or BS Series (RSC4-433-BS, RSZ1-433-BS). Convenient Two-Button Programming: This 2-button remote control is easy to program and provides reliable access to your garage door opener system. Compact Design: Measuring 66 mm x 30 mm x 14 mm, this remote is compact and portable, ideal for carrying in a pocket or attaching to a keychain. Color and Material: Black plastic finish. Note that slight color variations may occur due to lighting and screen settings. These variations do not affect functionality. Package Contents: 2 x Garage door opener remotes. Additional items not included. Note: Dimensions may vary by +/- 1-3 cm due to manufacturing tolerances.