This auction is for a Tektronix DTG 5274 Data Timing Generator (2.7Gb/s; s/n J300171), as shown. It is in good working condition, and comes with a Calibration Certificate (Calibration Date: Nov 12, 2007; In Service Date: Nov 12, 2008, Calibration Due Date: Nov 12, 2009). It comes with many accessories, as shown. Please see the last photo below for a complete list of accessories included.