High precision measurement: provides ultra-accurate readings with full coverage of 490, enabling easy measurement of absolute or relative angles and inclinations in any situation. Display: equipped with a large, clear LED display for real-time data visibility, even in daylightimproves efficiency of indoor and outdoor work, regardless of light conditions. Powerful magnetic base: magnetic design on all four sides for secure attachment to metal surfacesallows completely hands-free use and multi-angle alignment without slipping or shifting. USB rechargeable and auto shut-off: built-in rechargeable battery with USB chargingincludes data hold function and auto shut-off after three minutes to extend battery life and support field use. Durable and user-friendly design: rugged outer shell resists impact and everyday wearsimple operation with intuitive buttons: short press to turn on, long press to turn off, and ZERO button to reset the angle. Specifications: Color: black Model: 4-sided magnetic Accuracy: 0.2 Dimensions: 60 60 30 mm Package contents: 1 4-sided magnetic digital inclinometer Functions: Angle and slope conversion, relative measurement, absolute measurement, arbitrary position reset, automatic shutdown after 3 minutes, data hold, direct lithium battery charging.