The digital magnetic angle finder with bubble vial is a portable and lightweight tool, which can be easily carried with you while working at heights. It has a magnetic base that can be attached easily to the work surface area that is going to be measured. It also provides absolute and relative measurements, including the ability to zero set to any position. It is very useful for measuring or setting angles, and checking relative angles, measuring the bevel angle of the miter etc. The built-in level bubble vial on the top is designed for indicating whether the surface is horizontal (level) without battery. Its wide application includes but not limits to house decoration, building construction, automobile testing and repair, road and bridge slope detection. It is a great helper and choice for angle measurement and adjustment. Features: 4 units and 2 modes of measurement With calibration function With horizontal bubble (can be used for leveling without battery) V-groove magnetic base Bright LCD display Auto-rotating display Hold function Low battery indicator Lightweight and mini-sized with a free carrying pouch Specifications: Measuring range of display: 4 x 90° Accuracy: 0 & 90°: ±0.1°, the rest: ±0.2° Resolution: 0.05° Relative Measurement: set any angle to zero Unit of measurement: (degree °/ % / mm/m / IN/FT). Working Temperature: 0~40°C (32~104°F) Storage Temperature: -10~50°C ( 14~122°F) Dimensions (L*W*H): 68*32*62mm Weight: 100g (not containing batteries) Packaging: hard cardboard box Set comes with: 1 x Digital Angle Gauge 1 x Carrying Pouch 1 x User manual (English) 2 x 1.5V AAA batteries (Pre-installed) 1 x Mini screwdriver