Specification: Resolution:0.01mm/0.0005” Accuracy: ±0.02mm/±0.001” Repeatability:0.01mm/0.0005” Maximum Measurement Speed:1.5m/s—60in/s Operating Temperature:0℃~40℃ Storage Temperature:-10℃~60℃ Power:1.5v SR44(silver oxide cell)—1 battery Battery life:1 year continuous usage/3 years under normal operation Function 1. This caliper features mm/inch change-over at any position and zero setting at any position to make differential measurements 2. On the upper right side of the slider is a serial output,which can interface with a computer or printer via a special converter to process data Before Operation 1. Before using this caliper for the first time ,wipe the rust preventative oil over the caliper using a soft cloth 2. Remove battery compartment lid and insert SR44 battery with its positive(+) side facing upward Operating Instruction For absolute measurement——after turning unit on,close jaws and press “ZERO”switch.The “000.00mm” or “in 00.000” display appears,indicating origin(absolute zero)setting is completed.The caliper is now ready for absolute measurements. For compatison measurement ——after turning unit on,open the jaws to the object of reference and press the “ZERO” switch. The “0.00mm” or “ in 0.000” display appears,indicating zero setting is completed.The caliper is now ready for comparison measurements.