Vibration acquired: Piezo ceramic accelerometer (shear) LCD display: 3 digit half display measurement range: Acceleration: 0.1 - 79.9 m / s 2 (peak value) Speed: 0.1 - 199.9 mm / s (effective value) Displacement: 0.001 - 1.999 mm (effective value) Measurement accuracy: ± + % 2-digit frequency range Acceleration: 15Hz - 1KHz (LO), 1KHz - 10KHz (HI) Speed: 15Hz - 1KHz (LO) Displacement: 15Hz - 1KHz (LO) Temperature Measurement 0°C - 60°C, Temperature Accuracy: ±2°C, Auto Power Off Time: 4 minutes Power Supply: 3 x AA batteries (not included). Operating Humidity: 2 0%RH - 90% RH (without condensation); Storage Temperature: -4°F to 140°F (-20°C to 60°C); Size: Approx. 5.9 x 2.8 x 1.3 inches (150 x 70 x 32 mm); Weight: Approx. 25.7 oz (737 g).