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 of non-use. Highly recommended for home DIY and professional use. Measuring Range: 0-150 mm / 0-6 inch Display: LCD screen Maximum measuring speed: 1.5 m/sec Auto power-off: 6 minutes Power: CR2032 3V Accuracy: ±0.2 mm Working Temperature: 0°C to 40°C (32°F to 104°F) Working Humidity: ≤80% Storage Temperature: -50°C to 140°C 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 slight color variations between the item in the picture and the actual product. Measurement error allowance: ±1-3 cm.