DS-2040CA Digital Oscilloscope: 1.DC-40MHz,dual channel color display 2.1GS/s real sample,50GS/s equivalent 3.w/USB interface ... , Vrms, Vmin, Vtop,Vbase,Vbase,Vavg,Freq,Period,Rise timeFall time,+width,-width,overshoot,preshoot,+duty,-duty,etcMath +-×÷FFTStorage 10waveforms,10 ... ×2, power cord, user’s manual Dimension 303(W)×145(H)×288(D)mmWeight 5kg Video link: http://v.youku.com ...