This unit manufactured by Product Engineering will move double axle trailers beautifully and without failure. 120 volts, 1/2 hp motor, all (3) wheels are drive wheels, removable handle for storage, handles incline driveways, strong & durable frame, not cheaply made like other movers, stability with three 12 inch diameter wheels, heavy duty chain drive, heavy duty reduction gear box for torque required, knobby tread for traction, no battery to maintain, 3/8 thick lazor cut steel plate frame, tig welded, a solid made unit, custom colors available, plug it in- no battery to go dead or maintain