1.帶電源開關 Manual power on/off. 2.任意位置清零 Zero setting at any position. 3.帶數據輸出口 With data output interface. 4.mm/in任意位置公英制轉換 Metric/Inch system conversion at any position. 5.用于槽溝寬度測量 TTo measure the width of inside grooves.