Water Resistant Digital Calipers(Patented),Features: 1,Fully protected against the penetration of liquids and antimagnetic; 2,Ip65 prevent dust,spray water or oil from entering the calipers through effective encapsulation of the main parts; 3,auto power off; 4,Zero setting at any position; 5,Inch/mm conversion at any position; 6,Four-way measurement. Digital calipers which offers you easy reading,gearless measurements in both English and Metric display without the need to read a Vernier. The Easy Glide action provides the smoothnee and "feel" to make accurate measurements.Reads to 0.0005"(0.01mm). The digital caliper eliminates reading errors and makes it possible for even unskilled operators to measure quickly and reliable.It permits four types of different measurements,features such as scale on bar,hardened measurement surfaces,lockable jaws,storage case and a space battery to assure long and productive life. Specifications: Resolution:0.01mm/0.0005" Repeatabilty:0.01mm/0.0005" Maximum Measurement Speed:1.5mm/s-60"/s Operating temperature:0 to 40 centigrade Storage Temperature:-10 to 60 centigrade Power:1.5v SR44(silver oxide cell) Battery life:1 year continuous usage/3 years under normal operation Order NO.:1199W-616 Range:150mm/6" Resolution:0.01mm/0.0005" Order No.:1199W-626 Range:200mm/8" Resolution:0.01mm/0.0005" Order No.:1199W-636 Range:300mm/12" Resolution:0.01mm/0.0005"