Features:1. Professionally measure the inner and outer angles and angles of objects2. 0-360 complete measurement.3. Easy to lock at any angle, compact, accurate measurement, easy to read.4. With a locking knob, convenient to lock the angle at any position.5. 5 minutes automatically shut down, induction automatically boot.6. Button function: open / key, clear key, data hold button, degree and degree conversion buttonSpecification:Material: Carbon fiberABSSpecifications:0-200mm/0-300mm for chooseMeasuring range: 0-360 Resolution: 0.1 Accuracy: 0.3 Working power: 3VBattery model: CR2032Operation time: 5,000 hoursOperating temperature: 0 C - +50 CWorking humidity: 85%Automatic closed screen time: 6minUsages: Measurement of angle and lengthPacking Includes:1 x GoniometerDetails Pictures: