Parameter:            Specifications     nt Range     Best Accuracy           Model     UT312 Split style           Vibration Acceleration(O-P)     0.1-199.9m/s2;     Frequency response:10-1500Hz,Amplitude error:5%           Amplitude linear error:2.0m/s2;,10%; >2.0m/s2;,5%           Vibration Velocity(RMS)     0.1-199.9mm/s     Frequency response:10-1500Hz , Amplitude error:5%           Amplitude linear error:2.0mm/s,10%; >2.0mm/s,5%           Vibration displacement(P-P)     1 - 1999m     Frequency response:10-500Hz, Amplitude error:5%           Amplitude linear error:20um,10%; >20um, 5%           Functions                Data Hold     (auto data hold when releasing the measure key)           Low battery indication                Auto Power Off     (auto power off 1 minutes after releasing the measure key)           Display Modes     Digital display           Battery Life     Continuous measuring time > 20 hours           Maximum Display     1999           General Characteristics                Battery     6F22 9V battery           Product Colour     Red and Grey           Product Net weight     230g (including battery)           Product Size     185mm x 68mm x 30 mm           Standard Accessories     Holster           Standard Individual Packing     Gift Box, English Manual , Warranty Card.           Standard Quantity Per Carton     20 Pcs           Standard Carton Measurement     600mm×370mm×474mm           Standard Carton Gross Weight     About 5 Kg               Contrast:           Specifications     nt Range     Best Accuracy           Model     UT311 All in one     UT312 Split style           Vibration Acceleration(O-P)     0.1-199.9m/s2;     Frequency response:10-1500Hz,Amplitude error:5%           Amplitude linear error:2.0m/s2;,10%; >2.0m/s2;,5%           Vibration Velocity(RMS)     0.1-199.