DS-2040CA Digital Oscilloscope: 1.DC-40MHz,dual channel color display 2.1GS/s real sample,50GS/s equivalent 3.w/ ... , CH2, Ext, Ext/5, Ext(50Ω)Horizontal accuracy ±0.01%Vertical sensitivity2 mV/div to 5V/divVertical resolution8bitMax. input voltage400V(DC ... . MCH Digital Oscilloscope,DS-2040CA digital oscilloscope,40Mhz bandwidth,color display,dual channel