Features: Ultra-slim size, all aluminum alloy frame structure. Portable design and simple operation. Two strong magnets are built in the side and the bottom surface, which is convenient to measure the horizontal and vertical. High accuracy and resolution. Degree and Percentage of slope in conversion. Absolute &relative measurement modes. Large and clear LCD display. Measured data hold. Calibrate button to calibrate the meter to any reference surface. Displayed readings remain upright to enable easy viewing at all angles. Applications: Drive line Measurement. Race car wing and chassis adjustment. Wheel alignment. Drainage angles and run-off slopes. Tool setting on Lathes. Setting blade angle of Circular Saws/Miter Saws. Setting work piece angle for milling. Platform monitoring. Check drill press table setting, table saw, jointer table, band saw, jointer fence or band saw table. You can even put it into your clothing pockets for field works. Specifications: All aluminum alloy frame structure Two strong magnets are built in the side and the bottom surface Range: 0 ~ 90 x 4 quadrants (360) Resolution: 0.1 Operating Temperature: 0 ~ 40 Operating Humidity: 40 ~ 80% RH Power: 3 x 3V CR2032 Batteries(Not Included) Dimensions: approx. 52 x 52 x 25 mm/2.04 x 2.04 x 0.98 inch Quantity: 1 Pc Note: 1. The battery should be taken out for storage if the instrument will be kept idle for a long time period. 2. Since this product was only applies to two-axis measurements, in the third axis ( foot level front and back side) and at the horizontal angle was less than 45 , the LCD will display an error message "Err". Package Contents: 1 Pc x Digital Protractor