ACCURACY WITH EXTRA LARGE LCD：Equipped with an extra-large LCD display for effortless and precise measurements of length, caliber, depth, and diameter measurements up to 6"/150mm. Boasts accuracy of ±0.02mm/0.001" and 0.01mm/0.0005" resolution. CAUTION: Remove the protective film from the screen before use. Film may be scratched from friction during transportation. MEASUREMENT - UNITS x 3, MODES x 4：Switch seamlessly between metric - mm and SAE - inch and fractional units by pressing the "mm/in/F" button. Supports 4 measurement modes: length, caliber, depth, and diameter—ideal for circular and cylindrical objects. CONVENIENT BATTERY REPLACEMENT：No need to fiddle with a screwdriver! Replace the 3V CR2032 battery by using the included metal pin to open the compartment. A spare battery is provided for your convenience. GREAT GIFT, MULTIPLE APPLICATIONS：Heavy duty, solidly built calipers are a perfect gift packed in a sturdy, protective case for professionals and hobbyists - jewelers, woodworkers, DIYers, metalworkers, machinists, automotive mechanics, 3D printing specialists AUTO-POWER OFF: Features an auto power-off function after 5 minutes of inactivity to conserve battery. Can also be switched off manually at any time. Caliper switches on automatically when slider is moved. ZERO FUNCTION: Can be zeroed with the measurement jaws in any position. Handy for measuring deviations against a reference size. LOCKING SCREW: Locking screw at the top of the caliper allows easy adjustment of sliding resistance - tighten or loosen as per your preference STAINLESS STEEL, IP54-RATED: Constructed with high-finish stainless steel, IP54 splash and dust resistant - built to withstand tough work environments. The thumb roller / adjustment wheel is designed for comfort and ensures smooth sliding for consistent measurements. Overview: Item: 6 Inch / 150 mm Digital Caliper Material: Stainless Steel Measuring Range: 0-150 mm / 0-6 inch Unit Measurement: mm / inch / fractional inch Resolution: 0.01 mm / 0.0005” Accuracy: ±0.02 mm / 0.001” Repeatability: 0.01 mm / 0.0005” IP Protection: IP54 Battery: 3V CR2032 Operating Temperature: 5℃ - 40℃ / 41 ℉ - 104 ℉ Features: Our digital ruler is made of full stainless steel. It has two jaws and a probe, a knurled thumb roller and a locking screw to ensure smooth sliding and accurate positioning. The caliper tool has 4 measurement modes: external / outside measurement, internal / inside measurement, depth measurement and step measurement. Digital measurement tool - large LCD display helps you get accurate results easily and automatically. Digital calipers 6 inch / calibrador digital / micrometer caliper digital / measuring calipers digital / digital micrometer caliper comes with a ZERO button for you to reset to zero and start new measurement at any time. The metric caliper will automatically shut down after 5 minutes of inactivity to save the life of the battery. The digital calipers are an essential addition to the tool box of machinists, garage mechanics, anyone who is into home projects. They will be very useful on the shop floor, in a workshop, in a blacksmith workshop, auto repairs center, as well as at home in the garage workshop. This measuring instrument has a very large screen and can be easily read in different situations including outdoors and in low light conditions.