200/300mm Digital Instrument Angle Inclinometer Angle Digital Scale Electronic Goniometer Protractor Angle DetectorFeature: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 fiber + ABSSize:0-200mm:about 220mm;0-300mm:about 317mm.Measuring range: 0-360 Resolution: 0.1 Accuracy: 0.3 Working power: 3VBattery model:1*CR2032(not included)Operation time: 5,000 hoursOperating temperature: 0 C - +50 CWorking humidity: 85%Automatic closed screen time: 6minUsages: Measurement of angle and lengthPacking list:1 x 2-in-1 Digital Angle RulerNote:1. Please allow 1-3mm error due to manual measurement. please make sure you do not mind before you bid.2. Due to lighting effects, monitor's brightness contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item!