877Max 878Max Wireless Garage Opener Compatible with models: The 877Max 878Max wireless garage door opener is compatible with LiftMaster, Chamberlain, and Craftsman garage door openers manufactured since January 1993. Compatible models include Security+ 2.0 with yellow learn button, 315 MHz Security+ with purple learn button, 390 MHz Security+ with red or orange learn button, and 390 MHz Billion Code with green learn button. This product serves as a replacement for older 877Max and 878Max keypads. Strict quality control: Each 877Max 878Max wireless garage door opener undergoes multiple professional testing procedures before leaving the factory, including manual sampling inspection, ensuring reliable performance. Customer support: Support is available throughout your purchase and usage experience. Return and warranty services are provided. For any questions or issues during purchase or use, assistance is available through responsive professional support staff. Upgraded features: The 877Max 878Max includes enhanced functions such as temporary password, one-touch closing, and the ability to control multiple garage doors, offering greater convenience and expanded functionality. Ergonomic design: The 877Max garage door opener features a wireless keypad design for easy operation. It includes a backlit keyboard and a weatherproof flip cover for reliable use in low-light conditions. The unit is constructed with smooth ABS material in a gray finish, resistant to dirt and designed to prevent sharp edges, enhancing durability and user experience.