Durable Design: The 8 inch solid tires of the powered trailer dolly never go flat, while pre-lubricated gears ensure long-lasting performance. Ideal for hard, flat surfaces like concrete and asphalt (not suitable for grass, gravel, or slopes) Adjustable Height: Adjust the bracket height from 12.2 to 24.8 inches to fit most trailers and RVs. Ideal for varying ground clearance, making the motorized trailer a versatile and convenient tool Easy Operation: With a low-speed design (7m/min empty, 5.2m/min loaded) and an intuitive control handle, this electric trailer mover allows easy forward/reverse and precise steering, making maneuvering a breeze 800 lbs Load Capacity: Designed with a four-point steel bracket system, our motorized jockey wheel securely connects to your trailer, eliminating wobble or bending during use for a smooth, secure operation 5500 lbs Strong Pulling Power: Powered by a 380W copper motor and 326:1 reduction gear, this electric trailer dolly pulls up to 5500 lbs effortlessly—ideal for moving boats, RVs, and trailers with ease