360-degree panoramic function; Easy and fast operation on all the knobs; locking is highly effective; * Arca-Swiss type mount; Safety button to prevent quick-release plate from slipping out by accident; * Eequipped with a compatible quick-release plate; * Two bubble levels (one on top and one on the clamp locking knob) for fast horizontal and vertical alignment. * Red stoppers on QR-plate help to prevent camera/lenses from slipping in the vertical position;