【Accurate Calipers Measuring Tool & Auto Off】This digital caliper adopts glass fixed grid craft,high manufacturing technology, not subject to temperature changes and greatly ensures the stability of the measurement. Powered by battery and It will automatically turn off after 5 minutes of non-use to save power. 【Unit Conversion & Comfortable to use】These Digital Calipers have a one-key button to quickly switch from inch/millimeter.The measuring faces adjust with a machine-grooved, knurled thumb roller that provides an easy gliding, accurate position lock for a sure adjustment. 【Extreme Accuracy Measure Range】0-6 inches/150mm; Display: 38mm x 15mm extra large screen; resolution: 0.01"/0.1mm; Accuracy: + 0.2 mm/ 0.01 in''. 【4 Measuring Modes and Zero Seetting】 Digital caliper measure indoor, outside, depth, length, width with two sets of jaw and a probe.You can use zero setting at any position within measuring range. The smart design allows you to easily reset to zero by pressing a button and start a new measurement at any point on the scale, which is very suitable for differential measurement. 【Wide Application】The vernier calipers packed in a sturdy blue protective case with extra coin cell batteries, a mini rag and a user manual. This caliper measuring tool is ideal for woodworking, jewelry making, etc. It is widely used in home, industrial and automotive applications, it's also an excellent choice for mechanics, engineers, woodworkers, hobbyists.