Specifications: Acceleration 10Hz to 1KHz 10Hz to 10KHz 0.1-200m/ s Velocity 10Hz to 1KHz 0.1-400mm/ s Displacement 10Hz to 1KHz] 0.001-4.0mm Accuracy: 5j Auto power off RPM ( revolution) : 5-100000r/ min Frequency: 0. 1 to 10KHz Metric/ imperial conversion With RS232C interface Max hold Operating conditions: 0-+ 45 ( 32 -104 ) , d90% RH Power supply: 4x1.5V AAA ( UM-4) battery Battery indicator: low battery indicator Dimensions: 124x62x30mm Weight: 120g( not including battery) Standard Delivery: Main Unit 1 Carrying Case 1 Powerful Rare Earth Magnet 1 Piezoelectricity Transducer 1 Instruction Manual 1 Optional Accessories: Cable and Software for RS-232C Headphone as electronic stethoscope