"The Tow Tuff Electric Trailer Dolly is the best new way to move utility, boat, or cargo trailers! The unique, third wheel design stabilizes the load to move trailers and equipment safely. This trailer dolly is powered by a 24V two-sealed 7Ah batteries and has variable speeds in forward and reverse. It can travel up to 1.5 mph. Use this electric trailer dolly from Tow Tuff with a wide variety of trailers with the adjustable ball height from 22"" to 28.35"". This dolly features two 13"" tires and one 8"" swivel caster, making it perfect for all kinds of terrains. The trailer dolly's capacity of 3500 lbs. with a tongue capacity of 600 lbs. allows you to move a wide variety of trailers. Mfrs. 1-year limited parts warranty. Unique, third-wheel design stabilizes the load while moving trailers Powered by a 24V two-sealed 7Ah batteries Variable speed in forward and reverse Adjustable ball height of 22"" to 28.35"" Two 13"" tires and one 8"" swivel caster Heavy-duty structure for a long-lasting product Built-in step for added foot leverage Works with a 2"" coupler Travels up to 1.5 mph Capacity of 3,500-lb. LED battery indicator light"