Made of high quality materials. Two modes switch between Inch/mm can satisfy all your needs. 4 Way Measuring Tool for Internal, External, Depth, and Step measurements. 50x20mm screen, big LCD display for easy visible reading, high precision, resolution. ZERO function can be set in any position, calibration function, shuts off automatically after 6 minutes without use. Highly recommended for home DIY and professional use. Measuring Range: 0-150 mm / 0-6 inch. Display: LCD screen. Maximum measuring speed: 1.5m/sec. Auto power-off: 6 minutes. Power: CR2032 3V. Accuracy: 0.2mm. Working Temperature: 0-40C. Working Humidity: 80%. Storage Temperature: -50C to 140C. Please note that the screen has a protective film. Color: Silver. Material: Metal. Package Contents: 1 x Digital Vernier Caliper. Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement error allowance: +/- 1-3cm.