Parkit 360 B2 HD model, I have had this for a year and have not used it. You only need to buy a battery and your ready to go. Mobes up to 10K lbs.

No shipping local socal pick up only.

"P360 SD B2" 5000 lb Capacity unit comes with:

4" wide tires (will handle up to 900lbs tongue weight)
Ball Mount (With Parkit360's Stableloc Technology right out of the box your Parkit360 Trailer Dolly connect to almost any trailer).
Safe "Smart brake controller" built for Electric and surge brakes. (Plug in your trailers wire harness and the Parkit360 Trailer Dolly Will automatically operate your trailer brakes)
Battery Not Included. White Battery Box (Built for a series 24, 12 volt deep cycle battery)
Battery Charger (Built in battery tender)
This is brand new
(http://www.hirkophoto.com/img/s6/v146/p2247583627-5.jpg)