Package Content: You will receive 4 pieces of RB741 FM135 remote controls, designed for GTO door openers. Built-in instructions, sun visor, and a built-in 12V 23A battery provide everything needed for operation and convenience. Compatibility List: The RB741 FM135 remote control is compatible with GTO door openers such as models 350500502, MM260, MM271, MM360, MM371W, MM372W, MM560, MM562, MM571W, MM572W, MM600, MM660, and other models with 9 DIP switches, 3 positions, and a working frequency of 318MHz. Easy to Program and Carry: Simple to operate and program, allowing users to complete code settings easily. Features a compact size, lightweight design, and reliable performance for convenient use. Supported Models: 350, 500, 502, MM260, MM271, MM360, MM371W, MM372W, MM560, MM562, MM571W, MM572W, MM600, MM660, and other models with nine three-position DIP switches. Safe and Reliable: Upgraded with the latest RF technology and enhanced security encryption, offering improved signal transmission and reduced radio wave interference. Provides a stable operating range up to 100 feet for dependable performance with GTO door openers. Color: Black Material: Plastic Package Contents: 4 x Gate Opener Remote (Other items not included) Note: Lighting effects and display settings may cause slight variations between the image color and actual product color. Measurement allows an error of +/- 1-3 cm.