Keithley Instruments 7002 Electronic Switch System. It's used item. And good working condition. 
Acquired from government surplus. Working good condition. Check the pictures.Please ask more pictures if these pictures are not enough. I can send more pictures. No power supply or any other equipment. 
 
                                                          IMPORTANT INFORMATION - PLEASE READ  
We are not familiar with every item we sell.  Some items may have missing parts or accessories and we do not realize they are missing. Do NOT assume parts or accessories are included.  If they are not in the photos or in the description, then they are not included. Please review the description and photos carefully.  If you are not sure if an item is included, email us BEFORE buying or making an offer. 
 
Please check the picture for details or conditions. 
 
Please ask any questions you may have before buying..
 
The item listed has been used and although in great shape. 
I appreciate you taking the time to stop by my store. If I can be of any assistance, please let me know.