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Beagle USB 12 Protocol Analyzer
The Beagle USB 12 Protocol Analyzer ($399.95) is a non-intrusive and reliable tool with which to perform functions such as reverse engineer a USB device, lend a hand with enumeration, for real time data capture analysis, and is perfect for when a problem is bad enough it crashes the USB host. Data is captured in real time, saved and parsed.
Gallery main page: Ladyada's Hacker Gift Guide [Gift Guide 2012]