Digital protractor 83015-450

Measuring range - 0°-225’ Working température - 0°C~+50°C Working humidity ≤S85%RH Battery - 2 X1 5V Alkaline battery Battery life - More than 100 hours in continuous use FEATURE - Auto-calculate the Spring and Corner angle - Both measure the angle and level - Calculating angles quickly and accurately, digital display clearly - Good locking function could lock the measure-ment at any angle - With backlight, easy to read - High accuracy vial for measuring horizontal level easily - With absolute angle sensor, can instantly avaliable. no need to calibrate by yourself