1)Big LCD for easy reading. 2)Mannual power on/0fr. 3)Zero setting at any position. 4)Metric/lnch system conversion at any position. 5)Alloy housing is corrosion proof. 6)With data output interface Range(mm/in) Resolution(mm/in) Accuracy 0-150/6" 0.01/0.0005" +/-0.03 0-200/8" 0.01/0.0005" +/-0.03 0-300/12" 0.01/0.0005" +/-0.04