Migthy Mule MM271 Automatic Light Single Gate Opener, Designed For Light Duty Single Swing Gates Up To A Maximum Of 12' Long Or Maximum Weight Of 300 LBs, Perfect For All Single Gate Types, Including Tube, Ornamental, Chain Link, Panel, Vinyl & Wood, Includes Online How To Videos & Unlimited Access To 24 Hour Technical Support. This product can expose you to chemicals including Tetrabromobisphenol A, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.