... ,High contrast,Wide visual angle LCD display,white backlight;2,Dual-display:Main display 80000,Vice-display 80000,analog bar 21 sect.,unit ... 4,Frequency measuring can rearch 80MHz;5,Standard function generator:18 kinds of frequency,1%-99% Duty cycle,1800 pcs ... limit area measuring;17,photoelectricity insulation RS-232 computer interface;18,Timing measuring function;19,AC measuring adopt High accuracy ...