Features: Large LCD display for easy reading. Zero setting at any position. Manual power on/off. Linear capacitive measuring system, accurate. Metric/inch units interchange. Suitable for measuring jewelry, paper, magnetic products. Suitable for measuring the inside diameter, outside diameter and depth. Basic Measuring Methods: 1. Loosen the locking screw. 2. Switch the unit on with a press on ON button. The select the unit system needed by pressing mm/inch button. (Each time the button is pressed, inch and metric digits will be displayed alternatively) 3. Apply normal measuring pressure on slider to close the external measuring jaws. Then press zero buttom to reset the display to zero. 4. Can measure internal dimensions, also can measure external dimensions. Discounted at only: US$ 6.29 
