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 in/mm: inch/metric conversion ON/ZERO: power on,zero setting OFF: power off Switch off automatically Order NO.:111-002 Range:100mm/4" Resolution: 0.01mm/0.0005" Order No.:111-012 Range: 150mm/6" Resolution: 0.01mm/0.0005" Order No.:111-022 Range: 200mm/8" Resolution: 0.01mm/0.0005" Order No.:111-033 Range: 300mm/12" Resolution: 0.01mm/0.0005"