Package Content: you will receive 4 pieces of RB741 FM135 remote control, which are for GTO, for door opener The built in instructions, sun visor, and built in 12V 23A battery are sufficient to meet your use and needs, and you can operate them well Compatibility List: RB741 FM135 remote control is for GTO, for door opener, 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, the steps to complete your own code settings, highly safe and reliable, small size, light weight, 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 design a better working range, which can significantly reduce the radio wave interference signal reception and transmission range, up to 100 feet, and for , for GTO opener The highest level of encryption gives you peace of mind Long distance stable operation Colour:Black Material:Plastic Package Contents: 4 x Gate Opener Remote Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.