Here it is and here it is for Cheap!  This is a very rare, sound tester for metal working.  

this comes with the unit, manual, case and power cord (note- the power cord is a little loose plugged in, but powers the unit)

Condition -Near mint condition.  No real signs of use.  

Here is the info from the manufacture website:

"A BestSPEED dynamically preferred speed analyzer from Kennametal measures chatter sound from unstable machining processes using a non-contact microphone. The battery operated, hand-held unit then recommends dynamically preferred speeds to reduce the chatter. These speeds result in phase-locked vibration control that eliminates the regenerative cause of chatter. …"

Also -here is a link to a good article relating to this product :  www.mmsonline.com/articles/chatter-control-in-a-box

**Please note I am in the military reserves and sometimes get called away for duty.  I will try my best to ship ASAP, but sometimes there may be a few days between when you pay and I ship.