The Tow Tuff Tmd-35ETD8 Electric Trailer Dolly is an excellent way to move utility, boat, or cargo trailers and even fish houses. The unique, 3rd wheel design stabilizes the load to move trailers and equipment safely. This trailer dolly is powered by two 24 Volt sealed 7Ah batteries and has variable speeds for smooth forward and reverse movements. Dolly can also travel for up to 1.5 Mph.You can use this electric trailer dolly with a wide variety of trailers with an adjustable ball height from 22 inches up to 28.35 inches. This dolly features two 13 inch tires and one 8 inch swivel caster and is perfect for all kinds of areas and terrains. Whether you need to maneuver your trailer in tight spaces, navigate through challenging terrain, or simply save time and effort when hitching and unhitching, this electric trailer dolly provides an exceptional level of convenience and ease of use.