High precision measurement: provides ultra-accurate readings with full coverage of 490, enabling easy measurement of absolute or relative angles and inclinations in various applications. Display: equipped with a large, clear LED display for real-time data visibility, even in daylight - enhances efficiency for indoor and outdoor work under different lighting conditions. Powerful magnetic base: magnetic design on all four sides allows secure attachment to metal surfaces - enables hands-free operation and multi-angle alignment without slipping. USB rechargeable and auto shut-off: built-in rechargeable battery with USB charging - includes data hold function and automatic power-off after three minutes to conserve battery life. Durable and user-friendly design: robust outer shell resists impact and daily wear - simple 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.