Opteka DSL-4 Quad-Action Digital Spirit Bubble Level for Digital Cameras, DSLR's and Camcorders Attaches to any camera with a standard hot shoe fitting (adapter required for Sony/Minolta) Shows horizontal and vertical alignment 7 Top LED's change from red to green as your camera is leveled LED's on the side indicate when the camera is horizontal 3 Levels of brightness, includes 2 CR-2032 batteries