PRECISION MEASUREMENT - The stainless steel caliper gauge has a measuring range of 0-150 mm / 0-6 inches, with a precision of ±0.02 mm and a resolution of 0.01 mm. Integrated locking screws prevent accidental movement, ensuring the specified position is maintained for accurate, error-free measurements. TWO MEASUREMENT SYSTEMS - The 6-inch (150 mm) stainless steel digital caliper features an MM/IN button that instantly switches between millimeters and inches, eliminating the need for manual calculations. The knurled thumbwheel and locking screw ensure smooth sliding and precise positioning, saving time when measuring both metric and imperial components. MULTI-FUNCTIONAL MEASUREMENT - This 150 mm caliper includes outer and inner jaws, a depth rod, and step measurement capability. It can measure external and internal diameters (such as holes and slots), depth, and step dimensions. Widely used in industrial, automotive, professional, home, and office applications. HIGH-QUALITY MATERIAL & LARGE LCD DISPLAY - Constructed from durable stainless steel for smooth sliding action, long-term durability, and resistance to wear. The finely polished stainless steel housing meets IP54 standards, protecting against dust and water splashes. The high-resolution, large LCD display (12 mm x 31 mm) provides clear, easy-to-read results even in low-light conditions. AUTO-OFF & WARRANTY - Automatically powers off after 5 minutes of inactivity to conserve battery life. The digital caliper comes with a pre-installed 1.5 V LR44 alkaline lithium button battery and a replacement battery included. Backed by a 2-year warranty and a 30-day money-back guarantee for any reason. PRODUCT SPECIFICATIONS • Measurement range: 0–150 mm / 0–6 inches • Resolution: 0.01 mm • Accuracy: ±0.02 mm • Repeatability: 0.01 mm • Maximum measurement speed: 1.5 m/s (6 in/s) • Measurement system: Linear capacitive system • Display: LCD • Power supply: One 1.5 V LR44 alkaline lithium button battery (180 mAh) • Operating temperature: 5°C – 40°C (41°F – 104°F) • IP54 rated: Splash, dust, and oil resistant • High-contrast LCD display: 12 mm x 31 mm (0.47 x 1.22 inches) BATTERY REPLACEMENT INSTRUCTIONS: 1. Use a small screwdriver to open the battery compartment. 2. Remove the cover in the direction indicated by the arrow. Insert the new battery with the positive side facing outward, then securely replace the cover. PACKAGE INCLUDES: 1 x Electronic digital caliper 1 x Plastic storage case 1 x Extra button battery 1 x Mini screwdriver 1 x User manual