Package Content: You will receive 4 pieces of RB741 FM135 remote control for GTO door opener. The built-in instructions, sun visor, and built-in 12V 23A battery are sufficient to meet your needs, allowing you to operate them well. Compatibility List: RB741 FM135 remote control is compatible with GTO door opener models such as 350500502, MM260, MM271, MM360, MM371W, MM372W, MM560, MM562, MM571W, MM572W, MM600, MM660, and other 9 DIP switches with 3 positions and a working frequency of 318MHZ. Easy to Program and Carry: Easy to operate and program, with steps to complete your own code settings. Highly safe and reliable, small size, light weight, and easy to carry. Supported Models: 350, 500, 502, MM260, MM271, MM360, MM371W, MM372W, MM560, MM562, MM571W, MM572W, MM600, MM660, and other nine three position DIP switches. Safe and Reliable: After the new upgrade, the latest RF technology and powerful security encryption provide a better working range, significantly reducing radio wave interference. The signal reception and transmission range is up to 100 feet. The highest level of encryption ensures your peace of mind. Long distance stable operation. Colour: Black Material: Plastic Package Contents: 4 * Gate Opener Remote Only the above package content is included; other products are not part of the package. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.