1,Easy to use 2,Portable with Carry case 3,Digital Display Vibration Meter GM63B1,Easy to use 2,Portable with ... Carry case 3,Digital Display Acceleration0.1-199.m/S2 peak(rms ... *v2)Velosity 0.1-1999.9mms rms Displacement 0.001-1.999mm p-p(rms*2v2) ... User Manual GM63B Digital Vibration Meter Vibrometer Gauge Tester Analyzer 0.1-199.m/S2 peak(rms*v2)