Digital Protractor Angle Finder Level Inclinometer Magnetic V-Groove 0~360 degree with Backlight Measuring Range: 4 x 90 degree , mm/m : 1000mm/m,% : 100%, in/ft : 12in/ft Accuracy: 0 degree and 90 degree : +/-0.05 degree, the rest : +/-0.15 degree Resolution: 0.05 degree Working Temperature: 32 ~ 122 degree F (0 ~ 50 degree C) Applications: Automotive / Industrial / Setup of precision machines / Drainage angles and run-off slopes