Owon VDS-1022I USB oscilloscope review and tutorial - YouTube
OWON VDS1022I 2-ch USB Oscilloscope (25 MHz) | Elektor
Loto USB Oscilloscope OSC482M for Both Android Phone/Tablet & Windows PC, 2 Channels, 50M S/s, 20MHz (Bandwidth), 8~13 bit Vertical Resolution: Amazon.com: Industrial & Scientific