This listing is for a Transmation Transmitter-Simulator Model 1027.  Loop Calibrator/Signal Indicator.  Unit appears to be in nice shape.  I know absolutely nothing about this unit.  Being sold "AS-IS" for Parts or Repair.  Use the 'super size' feature on the pictures to get a better look.  

I offer $11.99 Ground Advantage shipping in the US and calculated shipping for international buyers.  Thank you once again.