... large view 3.Support USB for data transmission to PC ModelKangPut EDU5022S 7.8 "STN digital ... color STN LCD display, applied to basic education needs more water to meet the production line of ... AC,50Hz-60 Hz,CAT II PC interface RS232 cable or USB cable Display type 7. ... A BWaveform Math:+, -- ,FFTWaveform storage:4 waveformsCommunication interface:USBPower supply: 100V-240V AC, 50Hz,CATFuse:1A ...