ACCURACY AND ACCURACY - The measuring range of stainless steel calipers is 0-150mm/0-6"", and the accuracy is 0005&#34 ;" (0.13 m), 0.01 mm. Attached locking screws prevent accidents. While sliding, ensure the specified position and you get error-free measurement results. TWO MEASUREMENT MODES - 6 inch (0.15m) stainless steel digital calipers with MM/IN button instantly convert between inches/millimeters, no need to waste time on calculations . Then the knurled roller and locking screw ensure smooth sliding and precise positioning, no more wasted time finding different tools to measure SAE or metric parts. MORE MEASURING POSSIBILITIES - the 150 mm caliper has two outer jaws, depth measuring blades and a slide rule maintenance. Measurement of external and internal diameter (holes, slot, etc.) as well as depth and pitch measurement. It is widely used in industrial and automobile, professional, home and office measuring fields. High quality material and LARGE LCD DISPLAY - Stainless steel construction allows the digital micrometer to slide smoothly, ensures sturdiness and durability, long service life, easy storage and transportation. The finely polished IP 54 class stainless steel blocks splashes of water and dust. The large, high-resolution LCD screen helps you get accurate results quickly and easily. AUTO-OFF & GUARANTEE - automatic shutdown to save battery after 5 minutes of idle operation. The digital brake caliper with battery box comes with a pre-installed battery (1.5V button cell) and a replacement button. We promise 2 years warranty and 30 days money back service for any reasons. Product Description Technical specifications * Measuring range: 0150 mm / 0-6 inch (0.15 m) * Resolution: 0.01 mm * Accuracy: 0.02 mm (<100 mm); 0.03 mm (> 100200 mm) * Repeatability: 0.01 mm * Maximum measuring speed: 1.5 m/s, 6 in/s * Measuring system: Linear capacitive measuring system * Display: LCD display * Power supply: one 1.5V alkaline lithium button battery, type LR44, capacity 180 mAh * Operating temperature: 5 - 40 41 to 104 Waterproof, dustproof, anti-oil The large 12mm x 31mm (0.47 x 1.22) high-contrast digital LCD screen is quite easy to read. IP54 waterproof: splashing water, oil, dust resistance and automatic power on/off are convenient to use. REPLACING THE KEY BATTERY: - Step 1: use a screwdriver -step 2: remove the button cover in the direction indicated by arrow and replace the button cover (positive side out). PACKAGE INCLUDES: 1 x Electronic Digital Brake Caliper 1 x Plastic Case 1 x Extra Button Battery (Extra) 1 mini screwdriver 1 x user manual "