[Number]: Different from traditional calipers, this product is equipped with 50mm*18mm large LCD screen to display the value, with 0.01mm high resolution, which is very easy to read intuitively, letting you tell farewell to glasses and barely see the graduation / p [ABS]: Made of ABS, sturdy and durable, ensuring a long service life; two units of millimeters and inches, suitable for users with different habits; Auto shut off in 5 minutes to help you save battery power [Precision Tuning]: Spiral fine-tuning knob ensures easy fine-tuning and more accurate measurement, giving you high accuracy of 0.03mm; you can measure small items such as jewelry, antiques, jade, etc. [Gage]: Compared with ordinary rulers, this product can not only measure length, but also gauge and depth, so that you can measure round and cylindrical objects. More functions and better performance will satisfy you Advanced digital calipers can measure length, diameter, gauge and depth with high precision, suitable for measuring jewelry, antique jade and other objects small and easily scratched Features: Screw knob fine adjustment, easy to make fine adjustments, can measure very small objects No need to open it, it will automatically display the value when you press the body Specification: Material: ABS plastic + electronic components Size: 23.6*8*1.6cm Measurement range: 0-150mm Screen Size: 50mm*18mm Resolution: 0.01 mm / 0.0005 inch Accuracy: 0.03mmUnit:mm/inchWorking temperature: 0 to 40 Certification: CE/FCC Power supply: 1.5V button battery (not included) One-click conversion unit Two units of millimeter and inch Large LCD display, easy to read. Two units of millimeter and inch, the smallest scale is 0.01mm / 0.0005 inch.