... :7.8 inch color LCD,STN screen,640x480 pixelsIsolation between channel:50Hz(100:1),10MHz(25:1)Input impedance:1MΩ±2 ... , -Duty, Delay A B, Delay A BWaveform Math:+, -- ,FFTWaveform storage:4 waveformsCommunication interface:USBPower supply: 100V-240V AC, 50Hz,CATFuse:1A ...