... display 4.with USB interface MCH USB Oscilloscope, DS-2025CA Digital Oscilloscope, 25MHz freq. ,dual channelSpecifications: SpecificationsDS-2025CAChannels2+Ext. ... 5V/divVertical resolution8bitMax. input voltage400V(DC+AC peak),5Vrms@50ΩAuto measurementsVpp, Vamp, Vrms, Vmin, Vtop,Vbase,Vbase,Vavg, ... change without prior notice. 25Mhz DS-2025CA USB digital Oscilloscope dual channel 25MHz freq.,