Key features Range & AccuracyMeasurement Range: 0 - 6'' (0 - 150mm); Resolution: 0.01 inch (0.1mm); Accuracy: ±0.001''(0.02mm). Affordable yet accurate caliper measuring tool for household, DIY or professional measurements. Inch/mm ConversionOne button to quickly switch between mm, and inch. 4 Measuring ModesWith 2 sets of jaws and a probe, this metal digital caliper can measure inside diameter, outside diameter, depth, and step. Large LCD Screen & Auto-OffThe large LCD display helps you read results quickly and easily. This digital caliper will be automatically turned on when you slide the rail; it will auto shut off after 5 minutes without using to conserve battery life. Powered by one battery (included in the package). Zero Setting at Any PositionThe smart design allows you to set zero with an easy touch and start a new measurement at any point of the scale, ideal for differential measuring. Specifications:Material: Stainless SteelSize: 9.5 x 3.5 x 0.6 inWeight: 13 ozMeasuring Range: 0-6 inches/0-150 mmAccuracy:±0.02mm/0.001 (<100mm)±0.03mm/0.001” (>100-200mm)Resolution: 0.0005”/0.01mmBattery: 1.5V LR44 batteryIn the box:1 x Metal Digital Caliper2 x LR44 battery (1 battery is pre-installed inside the caliper)1 x Plastic Carry Case1 x Mini Screwdriver (for battery installation/removal)1 x User Manual Free shipping included. 30-day hassle-free returns.