3.7" usb digital oscilloscope *Digital oscilloscope *Bandwidth:20MHz Sample Rate ( Real time ): ... 17.5ns Display 3.7 inch color display with TFT panel(640×480 pixels, 65535 colors) Channels Dual Input impedance ... DC gain accuracy ±3% Automatic Measurement Vpp,Vavg,RMS,Frequency,Period,Vmax,Vmin,Vtop,Vbase,Width,Overshoot ,Preshoot,Risetime ... -N Handheld oscilloscope 20MHz 3.7" usb digital oscilloscope