Best Cost-effectiveness: We've crafted this plastic digital caliper with a singular focus delivering unmatched value at an unbeatable price. While others chase high-precision innovations, we prioritize essential features that truly matter. 4 Measurement Modes and Precision: Outside diameter, inside diameter, depth, and step measurements. Measurement range: 0-6 inches / 0-150 mm, accuracy: 0.2 mm / 0.01 inches. Whether it's for home projects, DIY, or 3D print, having this caliper will elevate you to be a measurement star. Low Energy Consumption Design with Smart Auto-Off Function: With just a single battery, our caliper can support 8+ months of measurements. It can automatically turns on when you slide it, and turns off within 5 mins when not in use, effectively conserving battery power. Tough Plastic Case Packaging and Secure Measurements: The plastic case packaging effectively protects the caliper from external impacts and friction, ensuring that it stays in optimal condition at all times. Moreover, our digital caliper is made of extra strong carbon fiber composites that are not easy to damage the measured object during use. What You Get: Digital Caliper *1, Tough Plastic Case *1, and LR44 button batteries *3(with one pre-installed). Additionally, we offer a lifetime warranty and friendly customer service to ensure your complete satisfaction.