This GemRed Digital protractor is equipped with a absolute level sensor which means there is no need to calibrate this unit. This unit is also equipped with a large easy to read backlit display. This is a Great tool for precision setup of all your machines to ensure accuracy in all of their operations. Display always reads upright, no matter which way the unit is turned. Built in low battery indicator tells you when it's time to replace the batteries.
Features:
With absolute level sensor, no need to calibrate by your self With backlight, easy to read Setup of precise machines Display always reads upright, no matter which way it is turned Low battery indicator
Specifications:
Measuring range: 4 x 90 degree Working temperature: 0 degree ~ +50 degree IP Grade: IP65 Magnets: Yes. (Built in to the base.) Battery: 2*1.5V AAA alkaline batteries (Not Included) Battery life: More than 100 hours in continuous using