Key points for use: The bubble inside the circle tell that the object is level as the bubble shows in the middle of the circle. Florescent yellow-green color, centering with black lines, clearly visible resolution from all sides, easy to read. Accurate and square on all sides. small pocket sized is perfect for quick use anywhere, makes adjusting more convenient and accurate and easy to use. This level can be used in many places, tripod, telescope, camera, you can glue this level on camera stand leveler, leveling , LCD mounts, adjust pictures/frame/murals, wall clocks, turntables, record player, speakers, phonograph. RV, , travel trailer, furniture placement,office desktop, computer chassis, display,3D printer, can be professional measuring layout and normal usage., Weight: 0.04078551847 Pounds, Manufacturer: Jaywool