16" Digital Protractor, Angle Finder & Level 0&deg;-225&deg; #677 Length: 16" Measuring angle range: 0-225 Degree Increase/decrease angle: 0.1 Degree Increments Automatically shut off after five minutes. Measuring precision: +-0.5degree Digital Accuracy 0.1 degree for all ranges Display reading "Hold" function Illuminated LCD display