Electrical levelling instrument is a portable tool which can measure the tilt angle quickly and accurately. Features : With 4 x 90 degrees measuring range and 0.2 degrees high accuracy, the two-sided laser digital inclinometer is designed for measure the tilt angle quickly and accurately. Relative or absolute measurement interchange at any position the absolute zero position has been factory-calibrated, the relative zero position can be set at any slope. 1.8-inch digital LCD screen, angle and slope readout conversion, data hold function, clear and intuitive. 3 minutes automatic shutdown function to save energy. 300mAh rechargeable lithium battery ensures strong endurance quickly recharge it via the type-C USB charging port. Built-in magnets in 4 corners ensure the inclinometer and measured object are close fitting. Mini size, lightweight and portable. Widely used in wood processing industry (especially in furniture manufacturing ) for the accurate cutting of wood angle, auto repair industry for the accurate control of tire angle, machine industry for the accurate position of tool working angle as well as the rotation angle of large vehicle arms, and etc. Note : Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications : Color : Black and Silver Material : ABS and Electronic Components and Magnet Display : LCD Measuring Range : 4 x 90 degrees Resolution : 0.05 degrees Accuracy : 0.2 degrees Repeatability : 0.1 degrees Built-in Battery : 3.7V 300mAh Lithium Battery Working Environment : -10 celsius -50 celsius , less than 85 percent RH Item Size : 60 x 60 x 32mm or 2.36 x 2.36 x 1.26in Item Weight : 112g or 3.95oz Package Size : 10.5 x 8.5 x 4.2cm or 4.13 x 3.35 x 1.65in Package Weight : 165g or 5.83oz Package List : 1 x Digital Inclinometer 1 x Cloth Bag 1 x USB Cable (Type-C ) 1 x User Manual (English )