Digital indicator 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 smoothness and "feel" to make accurate measurements. The digital indicator eliminates reading errors and makes it possible for even unskilled operators to measure quickly and reliable. Features:Max measuring speed:1.5m/s(0.01mm/0.0005") 0.3m/s(0.001mm/0.0001") Operating temperature:0-40 centigrade Storage temperature:-10-+60 centigrade Power:1.5v,VR44(silver oxide cell) 1 batter for 1 year continuous usage / 3years under normal operation. The measurement data can be output to an external data processor Back lug or flat back is selectalbe. For more and detail information,please visit our website