With the Trailer Valet RVR you can move your trailer into tight spaces without a vehicle or the power tools required by similar devices. It’s self-motorized & powered by a rechargeable lithium battery that gives you 30 minutes of runtime. Remote control allows for push-button control from up to 40 feet away. It features heavy-duty caterpillar treads for different terrain, including asphalt, gravel, grass, and dirt. Three models are available for 3,500 lb., 5,500 lb., and up to 9,000 lb. trailers.