Specification: Items:SW-65A sensor:piezoelectric acceleration sensor acceleration measurement0.1-199.9m/s2(peak value) velocity measurement range0.1-199.9mm/s(real-time valid value) displacement measurement0.001-1.999mm(peak-peak value) accuracy±(5%+2dgts) low frequency acceleration10Hz-1KHz high frequency acceleration1KHz-10KHz velocity measuring frequency10Hz-1KHz displacement measuring10Hz-500Hz storage capacity200 sets data refresh time500ms power2*1.5V AAA battery(not included) battery working lifebeyond four hours without breaks working temperature0-50 working humidity20%RH-80%RH storage temperature-20-60 storage humidity20%RH-80%RH height above sea level<2000m Weight: Approx. 668g / 23.6oz Size: Approx. 176 * 54 * 25mm / 6.9 * 2.1 * 1.0in Package List: 1 * Handheld Vibration Meter 1 * User Manual 1 * Hanging Rope 1 * Handle Box 1 * Probe