Smart Replacement: This efficient garage door opener is designed to replace 433.92 MHz remotes, not an original product. Universal Compatibility: Compatible with handheld transmitters RSC2, RSE2, Liftronic500/700/800. 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 user-friendly and easy to program, providing seamless and secure access to your garage. Perfect Dimensions for Portability: Compact size measures 66 mm x 30 mm x 14 mm, making it easy to carry in a pocket or attach to a keychain. Color: Black Material: Plastic Package Contents: 2 x Garage Door Opener Remotes Note: The actual product may vary slightly in color, which does not affect functionality. Lighting and display settings may cause slight color differences. Measurement may vary by +/- 1-3 cm.