Premium Material: Wont scratch your valuable objects when measuring, serve you for years. Accurate Reading: Strictly tested to ensure exact measurements which accurate to 0.01 inch. Zero Calibration: Press to set to zero at any position and continue to measure next section. Unit Conversion: Easy to read in inches and mm by pressing the blue button on the top. Large LCD Display: Shows instant readings with digital numbers, much more convenient. Auto On/Off: Auto turns on when sliding, auto turns off after 5mins if with no operation. 4Ways of Measurement -External Measuring: Measuring the outer diameter of objects with the long jaws. -Internal Measuring: Measuring the inner diameter of objects with the top jaws. Depth Measuring: Measuring the depth of hard-to-reach small objects with the long probe. -Step Measuring: Measuring the height/length with its step design. Specifications: ? Weight: 350g ? Display: LCD screen ? Color: Silver ? Power: one Battery (included), LR44/AG13 1.5V ? Measuring Range: 0-150 mm / 0-6 inch ? Resolution: 0.1 mm / 0.01 inch CAUTION: 1. The digital caliper is only for household measurement, such as jewelry, gadgets and other household objects. 2.If for industrial measurement, please buy a more professional and more accurate measuring tool in professional field. 3. If you find the readings are not accurate, please slide the LCD screen to the left end (0 on the scale), and then press the zero button. Welcome to write to us for more questions. Package 1 x Digital Caliper + 2 x Batteries [4 measuring methods and safety]: Digital calipers can be used to measure inner and outer diameters, depths and steps. The pins of the caliper are made of plastic, so there is no short circuit when measuring the battery or inside. Contact with the positive and negative poles. The safety is higher than that of metal calipers. [Measurement accuracy]: measurement range: 0-6"/0-150mm; resolution: 0.01"/0.1mm; accuracy: 0.2mm/0.01. A perfect and accurate caliper measuring tool, suitable for home/jewelry/DIY measurement, please pay attention. This caliper is not suitable for professionals with high technical accuracy. [Inch/mm conversion]: Use Simhevn digital caliper to switch freely between inches and millimeters. The switching function of the two units can meet different needs. It is more convenient and widely used for measuring the value you want. [LCD and automatic shutdown]: High-quality and trustworthy digital calipers, LCD display screen reading is more convenient, quick and easy to get accurate results, open automatically turn on, and automatically turn off after 5 minutes of use. It is powered by a battery and includes a pre-installed battery and a spare battery. [Zero reset function]: Intelligent design, you can easily reset to zero by pressing the "Zero" button at any position of the measurement, and start a new measurement. It is very suitable for differential measurement, convenient for measurement, and easy to carry.