This is a Manfrotto video head, the 503HDV. It has been used to a certain extent. Operation has been confirmed. Product Overview of the Manfrotto Manfrotto Pro Video Head 503HDV Ergonomic Design The 503HDV has been newly designed with ergonomics in mind. It dramatically improves operability and features a 4-step adjustable counter balance, tilt lock, and friction knob concentrated on the left side, enabling quick and smooth operation. Suppresses unwanted tilting In particular, the 4-step variable counter balance automatically balances the front and rear even when the head is off-center from the tripod's center of gravity, such as when tilting the camera, suppressing unwanted tilting. This system not only allows for smoother tilting, but also maintains the camera's position even when the tilt lock is released. Counterbalance: 4 steps: 0Kg, 1.3Kg, 2.6Kg, 3.9Kg Pan/Tilt Drag: Continuously variable adjustment Plate Type: 501PL Maximum Load Capacity: 8kg Weight: 1.95kg