This is the Trekker Mark 3 model with the ballhead. The Benbo design provides unprecedented flexibility in camera positioning - for example, have the camera at ground level. You can find plenty of reviews and info on the web so I won't go into detail. I bought this new about a year ago and used it a few times, then realized it just did not suit my shooting style. It's in pristine condition and includes the carrying bag that came with it. Costs $150 at B&H photo. Your cost $100 including UPS shipping within the CONUS.