Versatile OD measuring gages for 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: Analog / Digital Power Supply: AAA Battery (2 pcs.) Battery life: Approx. 350 hours