... USB interface MCH USB Oscilloscope, DS-2025CA Digital Oscilloscope, 25MHz freq. ,dual channelSpecifications: SpecificationsDS-2025CAChannels2+Ext.TriggerBandwidth25MHzRising time13.8nsTime ... , Vamp, Vrms, Vmin, Vtop,Vbase,Vbase,Vavg,Freq,Period,Rise timeFall time,+width,-width,overshoot,preshoot,+duty,- ... without prior notice. DS-2025CA USB Oscilloscope, 25MHz freq.,dual channel digital oscilloscope