The Trailer Valet RVR Series remote controlled RV and trailer movers. The Trailer Valet RVRs are designed to take the chore out of moving your trailer. With the RVR you can now move your RV or boat with a press of a button. The remote has a long range and can be operated safely from up to 40 feet away which allows you to walk around and ensure you can tuck your trailer into that spot you you have always wanted to. All three RVR models come with a rechargeable lithium-ion battery that can give you up to 30 minutes of runtime while in constant use. Heavy-duty caterpillar treads allow the RVR to go over different terrains including asphalt, gravel, grass, and dirt. The RVR also comes with 2 or 4 planetary gear motors that can drive both single and dual axle trailers. Now you can take your RV or boat into places you never dreamed unless you had a forklift at home. The RVR9 has a compact design: Measuring at 22″ x 18″ x 12″, weighing 77 lbs and comes with 4 high torque planetary motors to drive most single axle trailers and some dual axle trailers. The RVR9 Aluminum Body: Allows for a lightweight design and is corrosion resistant. Heavy Duty Treads: Caterpillar Treads that give you more traction over different surfaces. Wirelessly Controlled: Easily and safely operate from any angle up to 40 feet away with the push of a button. *The RVR9 can push a trailer up a 5% grade (Never pull your unit up any kind of incline). The RVR9 Box includes: 1 RVR9 Unit 1 RVR9 Charging Cable 1 Trailer Valet Ball Attachment with 2″ & 2.5/16″ Ball 1 Wireless Remote 1 Tightening Tool