Versatile ID measuring gages for holes diameters, groove thickness, tube thickness, and hard-to-reach dimensions. The Digimatic. Caliper Gages provide error-free LCD readings as well as data output for SPC analysis. Technical Data Accuracy: Refer to the list of specifications. Resolution: .001”, .0005”, or .0002” 0.01mm, 0.02mm, or 0.005mm Display: LCD Analog / Digital Power Supply: AA Battery (1pc) Battery life: Approx. 350 hours Measuring Force: 0.7 - 1.7N