ELECTRONIC CALIPER, 0-6"/0-150mm Accuracy: +/-.0008", Resolution: .0005"/0.01mm. Includes Inspection Certificate traceable to NIST. Automatic power off, move the digital unit to turn on power. Data Output ( cables: 7302-SPC5A, 7306-20, 7305-SPC2A, 7305-A01/A02). CR2032 Battery