Package Content: you will receive 4 pieces of RB741 FM135 remote control, which are f GTO, f do opener The built in instructions, sun vis, built in 12V 23A battery are sufficient to meet your use needs, you can operate them well Compatibility List: RB741 FM135 remote control is f GTO, f do opener, such as 350500502, MM260, MM271, MM360, MM371W, MM372W, MM560, MM562, MM571W, MM572W, MM600, MM660 other 9 DIP switches, with 3 positions a wking frequency of 318MHZ Easy to Program Carry: easy to operate program, the steps to complete your own code settings, highly safe reliable, small size, light weight, easy to carry Suppted Models: 350, 500, 502, MM260, MM271, MM360, MM371W, MM372W, MM560, MM562, MM571W, MM572W, MM600, MM660 other nine three position DIP switches Safe Reliable: after the new upgrade, the latest RF technology powerful security encryption design a better wking range, which can significantly reduce the radio wave interference signal reception transmission range, up to 100 feet, f , f GTO opener The highest level of encryption gives you peace of mind Long distance stable operation Colour:Black Material:Plastic Package Contents: 4 Gate Opener Remote Only the above package content, other products are not included. Note: Light reflection different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is and or - 1-3cm.