Analog Discovery 2 by Digilent is a USB oscilloscope, CRO, multi-function instrument that allows users to measure, visualize, generate, record, and control mixed-signal circuits of all kinds.
You can get this device on the link below.
http://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/
