Product Description 573-645-20 Mitutoyo ABSOLUTE Inside Caliper - Inside Groove Type: 10-160mm The Mitutoyo573-645-20ABSOLUTE Groove Type Inside Caliper has the following specifications: Range: 10-160mm Resolution: 0.01mm Accuracy: +/- 0.05mm Mass(g): 147 Remarks: Inside Groove Type Features: Specially designed for inside measurements in hard-to-reach places With SPC data output. (Series 573) Supplied in fitted plastic case. 18"/450mm and 24"/600mm supplied in wooden case. Technical Data: Display: LCD Length standard: ABSOLUTE electrostatic capacitance type linear encoder Max. response speed: Unlimited Battery: SR44 (1 pc.), 938882 Battery life: Approx. 3.5 years under normal use Digital models Analog models Function of Digital Model Origin-set, Zero-setting, Power On/Off, Data output, inch/mm conversion (inch/mm models) Alarm: Low voltage, Counting value composition error