The Faithfull Digital Calipers are made from hardened stainless steel, this electronic digital caliper provides precision readings through a clear liquid crystal display. Its many features include a fine adjustment roller which allows precise measurements to be taken quickly and easily. The digital section button enables readings to be displayed in either metric or imperial format. The four-way measurement function provides a choice of readings in external, internal, depth and step modes. The strong plastic storage case enables the caliper to be kept in a dust and damp free environment. Specifications: Measuring range: 0-150mm / 0-6in Resolution: 0.01mm / 0.0005in Accuracy: ±0.03mm / 0.001in Repeatability: 0.01mm / 0.0005in Max measuring speed: 1.5m/sec, 60in/sec Measuring system: Linear capacitive measuring system Display: LCD display Character Height: 6.35mm Working temperature: 5-40°C, 41-104°F Data output: Serial output for interface with computer or printer Battery: 1.55V, LR44 Auto power off: 5 minutes