The MM571W is a smart gate operator providing you the ability to control your gate from anywhere using your Mighty Mule smart phone app. (Requires MMS100 Wireless Connectivity Kit - sold separately). The Mighty Mule 571W replaces the MM560Designed for heavy duty single swing gates up to a maximum of 18 ft long or maximum weight of 850 lbs. Ideal for the DIY property owner, the MM571W comes equipped with detailed instructions, online how-to videos & unlimited access to 24 hour technical support. Perfect for all single gate types including ornamental, chain link, tube, panel, vinyl and wood.