About This TYPE-C RECHARGEABLE DESIGN: The caliper has a built-in high-efficiency lithium-ion battery that can be recharged quickly, eliminating the need for frequent battery replacements, long use time, saving energy. (Charge fully in 50 minutes) STAINLESS STEEL CONSTRUCTION: The vernier caliper is made of high-strength stainless steel and is waterproof and dirt-proof. Provides durability and maintains accuracy longer than plastic-component calipers. LARGE LCD DISPLAY & AUTO OFF: Digital calipers feature a large LCD display that is easy to read. It automatically powers off after 5 minutes of inactivity to save power. PRECISION MEASUREMENT: The digital calipers offer ±0.001“ (0.03mm) accuracy in the 0-12”/300mm range with a resolution of 0.0005" (0.01mm). Smooth-gliding thumb roller and locking screw ensure stable measurements. Zero-setting function allows differential measurements from any position. INSTANT UNIT CONVERSION: One-button switching between decimal inches, fraction inches, and millimeters. Ideal for machinists, jewelers, woodworkers, and automotive technicians. FOUR MEASUREMENT FUNCTIONS: Measures internal dimensions, external dimensions, depth, and step levels using dedicated jaws and depth rod. Suitable for various machining, woodworking, auto repair, jewelry craft and daily DIY. CUSTOMER SUPPORT: Contact us for assistance with product use or concerns. Our dedicated team provides prompt solutions to ensure your satisfaction. Overview Brand : Preciva Material : Stainless Steel Range : 12 Inches Measurement Accuracy : ±0.03MM/0.001IN Number of Batteries : 1 Lithium Polymer batteries required. (included)