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
Digital Oscilloscope USB Bluetooth 1MHz Support For Android Mobile Phone PC | eBay
USB Oscilloscope 2 Channel 50MS/s 20M Bandwidth For Android /Tablet PC OSC482M | eBay