... for large view 3.Support USB for data transmission to PC Oscilloscope Performance characteristics:Model: PDS5022SBandwidth:25MSample rate ... 8 inch color LCD,STN screen,640x480 pixelsIsolation between channel:50Hz(100:1),10MHz(25:1)Input impedance:1M ... VideoTrigger level: ±6 divisions from screen centerTrigger mode:Auto, Normal, Single;Automatic measurement:Vpp, Vavg, RMS, Frequency, Period, Vmax, Vmin ...