PRECISION AND ACCURACY - The measuring range of stainless steel vernier caliper gauges is 0-150mm/0-6℉, and the accuracy is ±0.005℉(0.13m), 0.01mm. The attached locking screws prevent any accidental sliding, ensure the specified position and you get error-free measurement results. TWO MEASURING MODES - The 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 accurate positioning, no more wasting time finding different tools to measure SAE or metric parts. MORE MEASURING POSSIBILITIES - 150mm vernier caliper has two outer jaws, depth measuring blades and slide rule maintenance. Measuring outer and inner diameter (holes, slot, etc.) as well as measuring depth and step. It is widely used in industrial and automotive, professional, home and office measurement fields. HIGH QUALITY MATERIAL & LARGE LCD DISPLAY - Stainless steel construction allows the digital micrometer to slide smoothly, ensures sturdiness and durability, long service life, easy storage and transportation. Finely polished IP 54 grade stainless steel can block splashing water and dust. Large high-resolution LCD display helps you get accurate results quickly and easily. AUTO-OFF & WARRANTY - Auto shut-off to save battery life after 5 minutes of inactive 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-year warranty and 30-day money back service for any reasons. Product Specifications * Measuring Range: 0–150mm / 0-6inch (0.15m) * Resolution: 0.01mm * Accuracy: ±0.02mm (<100mm); ±0.03mm (>100–200mm) * Repeatability: 0.01mm * Maximum measuring speed: 1.5m/s, 6in/s * Measuring system: Linear capacitive measuring system * Display: LCD screen * Power supply: One 1.5V alkaline lithium button battery, LR44 type, capacity 180mAh * Operating temperature: 5℃-40℃ 41℃-104℃ Waterproof, dustproof, oilproof The large 12mm x 31mm (0.47″ x 1.22″) high-contrast LCD digital display is quite easy to read. IP54 waterproof: splashing water, oil, dustproof and auto power on/off are convenient to use. KEY BATTERY REPLACEMENT: - Step 1: Use a screwdriver - Step 2: Remove the button cover in the direction of the arrow and put the button cover back on (positive side out). PACKAGE INCLUDES: 1 x Electronic Digital Brake Caliper 1 x Plastic Case 1 x Extra Button Battery (Extra) 1 x Mini Screwdriver 1 x User Manual