Features:Vibration meter(also called vibration severity) uses Piezoelectric Acceleration Transducer transfer the vibration signal into electrical signal, analyze the input signals, and show the Acceleration, speed, shift of the vibration. It is widely used in the lines of power, petrochemical, machinery manufacturing, metallurgy, vehicles, etc.High sensitivity probe for accurate measurement, provides long and short probe head,each one is suitable for different situation measurement.Simple to use, the structure is compact, portableLCD backlight, Digital display is intuitive and clearVisually displays measurement value and state, different vibration frequency selection.Specification:Model: AS63D Measuring Principle Piezoelectric Ceramic Accelerometer:shear-typeAcceleration Range: 0.1~199.9m/s²Velocity Range: 0.1~199.9m/sDisplacement Range: 0.001~1.999mmAcceleration Frequency Range:10Hz~1KHz (LO) 1KHz~15KHz (HI)Velocity Frequency Range:10Hz~1KHzDisplacement Frequency Range: 0Hz~1KHzAccuracy:±10%H±2 digitsSignal Output /Max Hold FunctionTemperature Measurement:℃/℉SelectionPower Supply 2*1.5V AA Battery (not included)Size: 180 * 42.5 * 30mm / 7.1 * 1.7 * 1.2inPackage list:1 x Vibration meter ( Batterynot included)1 x instructions2 x Probe (one on Vibration meter)1 x Plastic case