... 2040CA Digital Oscilloscope: 1.DC-40MHz,dual channel color display 2.1GS/s real sample,50GS ... /s equivalent 3.w/USB interface MCH Digital Oscilloscope,DS-2040CA Digital Oscilloscope,dual channel,color ... 40MHzPhase diff±3 degreesDisplay A/CA: mono/color,320×240 resolutionPower supply Worldwide 100-225 ... digital oscilloscope,40Mhz bandwidth,color display,dual channel