Mighty Mule MM572W Heavy Smart Dual Gate Opener, Smart Features Allow Control From Anywhere Using Smart Phone App Or Mighty Mule MMS100 Wireless Connectivity Kit Sold Separately, MM572W Is Designed For Heavy Duty Dual Swing Gates Up To A Maximum Of 18 Long Or Maximum Weight Of 850 LBs, Includes Online How To Videos & Unlimited Access To 24 Hour Technical Support.