Tektronix TLA715 Logic Analyzer (s/n B020491; Application S/W V4.1), as shown. It is in good working condition, and it comes with a Calibration Certificate (cal due again after July 2009). It comes with many accessories, as shown. Please see the last photo below for a complete list of accessories included. Please see my other auctions for plug-in modules for this mainframe. Sold as-is.