Features: 1.USEFUL 3-IN-1 DEVICE - This newest digital gadget features with protractor, angle finder and level in one measuring tool. Large and ultra clear display helps you to work at dark condition. 2.WIDE APPLICATIONS - Great tool for automotive, wood & mechanical industries, machinery, medical fields and etc 3.V GROOVE BASE - The V Groove base with strong magnets enables strong attachment over a curve or cylindrical magnetic surfaces such as metal pipelines or shafts 4.CONVERTS ANGLE TO OTHER UNITS : Conversions between : 4 x 90˚ m/m : 1000mm/m, % : 100%, in/ft : 12in/ft. No more guessing or fuzzy conversion! 5.ABSOLUTE & RELATIVE MEASUREMENT - The regular absolute measurement mode can only measure the angle against horizontal plane. This tool also features with relative measurement mode for quickly measuring angle between two measured surfaces. Specifications: Display range: 0~90° Power supply: 1 * AAA battery (not included) Resolution:0.05° Accuracy:±0.1 Material: plastic colour: As shown Package Contents: 1 x Inclinometer (Battery not included) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.