The MM572W Smart Dual Gate Opener brings unrivaled convenience with smart features. The MMS100 Wireless Connectivity Kit is sold separately on www.homedepot.com, and allows gate control from anywhere using your smart phone. The MMS100 provides control for gates installed as far as 1/2 mile from your home. The MM572W is designed for heavy duty dual swing gates up to a maximum of 18 ft. long or maximum weight of 850 lbs