3 Axis Bubble Level allows you to level a camera on 3 planes. It comes encased in a crystal clear housing with green fluid and mounts effortlessly into the hot shoe of any standard 35mm SLR camera. Eliminates the need to ever re-orient the level when switching from Landscape to Portrait with your camera. Using a bubble level will help to achieve a finer degree of accuracy in capturing image content. Ideal for QTVR shooting sessions, landscapes, or anytime a straight horizon is crucial.