HIGH ACCURACY: This digital level is a good tool for professionals and even amateur workers with its high accuracy level 0.1 @ 0 & 90 / 0.2 @ other angles. The reading unit is changeable to degrees, IN/FT steps, mm/M and slope percentage. SMART DISPLAY: Brightest green LED digital display for easy reading and operation. The measured reading value is always straight even if the level is upside down. V-GROOVE with STRONG MAGNET: The measuring base is designed with a groove and built-in powerful magnets making the measurement more convenient and aligned. The level frame is also sturdy aluminum alloy with IP65 waterproof and dustproof level, the best tool on the go even in harsh environmental conditions. ABSOLUTE AND RELATIVE MEASUREMENT: Capable of measuring the angle of a horizontal plane and at the same time also has relative measurement for quick and accurate angle measurement of two surfaces. BEEPER / SOUND FUNCTION: Audible sound that will help indicate the measuring angle of 0 and 90 in horizontal or vertical position when eyes are not able to see the display. Specification: Working Range: 4 x 90 | 1000mm/m | 100% | 12in/ft Accuracy: 0.1 @ 0 & 90 / 0.2 @ other angles Resolution: 0.05 Power source: 2 x AAA batteries Working environment: 0 to 40 C (32 to 104 F) | 85% Protection degree: IP65 Dimensions: approx. 151 x 60 x 32 mm (L x W x H) Weight: approx. 263g