identify if your camera is set up level on a tripod. A must have product for macro . Compatible with most DSLR Cameras with a Standard Hot Shoe Mount. Note: Not for / Alpha cameras because of different hot shoe design. Made of plastic, being light, in a small size, high quality and novelty design. The spirit level mounts effortlessly right into camera's hot shoe, and it can be placed on a flat portion of the camera, which corresponds to the lens axis. :plastic colour:As shown Package Contents: 2 * Triple 3 Axis Hot Shoe Bubble Spirit Level Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.