... 3.w/USB interface MCH Digital Oscilloscope,DS-2040CA Digital Oscilloscope,dual channel,color dispaly,40Mhz bandwidth.Specifications: SpecificationsDS ... YBandwidth 40MHzPhase diff±3 degreesDisplay A/CA: mono/color,320×240 resolutionPower supply Worldwide 100-225 V ... subject to change without prior notice. MCH Digital Oscilloscope,DS-2040CA digital oscilloscope,40Mhz bandwidth,color display,dual channel