The Seeed DSO Nano V3 is a pocket-size 32bit digital storage oscilloscope that allows observation of varying signal voltages, and currents. Great for hobbyists and tinkerers, this oscilloscope comes with a 320-by-240-pixel display, USB charging port, and six easy-to-navigate buttons to change functions and measurement. This updated version of the DSO Nano features new firmware (click here for the manual) for a more user-friendly interface and an embedded 2-MB storage chip in place of the SD card slot.