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 easy to program, providing seamless and secure access to your garage. Perfect Dimensions for Portability: Sized at 66 mm x 30 mm x 14 mm, this remote is compact and easy to carry in a pocket or on 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. Light reflection and display differences may cause slight variations in the item's color as seen in images. Measurement error is +/- 1-3 cm.