Our digital caliper quickly displays your measurements in large, easy-to-see LCD numerals. It measures outsides, insides, depths .0005 inch or .01mm. A 'Zero' (tare) button lets you take '2-step' measurements without calculations; another button instantly converts inches to millimeters and back again. Made of hardened stainless steel for long life. Includes battery (LR44) (AG13) calculator battery, instructions and foam-lined case. Uses: micro-electronics, model rc/plane car, trains. Medal smithing. etc.Made of hardened stainless steelInternal, external and height dimensions can be easily and accurately measured Linear capacitive measuring systemBase measuring function: Inside, outside, depth and step measuringZero setting in any positionWith a small locking thumb screw which locks the jaws in placeWith easy to read Large LCD DisplayHandy conversion chart at the back Features:Measuring range: 0–150 mm/ 0–6 in.Accuracy: + 0.02 mm/ 0.001 in, (<100 mm), + 0.03 mm/ 0.001 in. (>100 – 150 mm)Resolution: 0.01mm/ 0.0005 in. Repeatability: 0.01mm/ 0.0005 in.Maximum measurement speed: 1m/s Power: 1 x 1.5V SR44 (silver oxide cell) battery (included)Battery life: 1 year for continuous usage / 3 years under normal operationSize: 250 x 50 x 6 mm