1. Made of high quality materials, and . 2.Two modes switch between Inch/mm can satisfy all your needs 3.4 Way Measuring Tool for Internal, External, Depth , Step measurements 4.50x20mm screen,big LCD display for easy visible reading, high precision, Resolution; 5.ZERO function can be set in any position, calibration function,Shut off automatically after 6 minutes without using. It is highly recommended for home DIY using as well as professional using. Measuring Range: 0-150 mm / 0-6 inch Display: LCD screen Masimum measuring speed:1.5m/sec Shut off automatically:6 minutes Power: CR2032 3V Accuracy:±0.2mm Working Temperature:0- 104°(40°) Working Humidity:≤80% Storage Temp:-50°C--140°C Please note that the screen has a protective film Colour:Silver Material:Metal Package Contents: 1PCS x Digital Vernier Caliper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.