VELLEMAN WFS210 2CH WLAN DIGITAL STORAGE OSCILLOSCOPE. The Velleman WFS210 is the world"s first wlan dual channel digital storage oscilloscope geared towards tablet computers.The WFS210 is a compact, portable battery powered fully featured two channel oscilloscope. Instead of a built-in screen it uses your tablet (iOS, AndroidTM or PC(Windows)) to display the measurements. Data exchange between the tablet and the oscilloscope is via wlan.iPad App available