Accurate ------ Measuring range: 0-6 inches 0-150 mm; Resolution: 0.03 mm; Accuracy: 0.03 mm; Battery included: CR2032. Quality structure with perfect workmanship ----- The digital caliper is made of high-quality hardened stainless steel, rust-proof, dust-proof and waterproof. Large screen size ----- A high-quality digital screen makes it easy to read. The thumb screw allows for easy sliding, positioning and precise adjustment. Multifunction ----- This caliper is ideal for precise measurements of internal, external and even depth dimensions. Readings can be displayed in inches or millimeters. The zero function can be used at any time to allow measurement of differences between measurements. Ideal for all types of measurements ----- This LCD digital caliper is very easy to use, portable, lightweight and durable. It is an ideal measuring tool for a wide range of industrial, electrical, automotive hobbyist applications