The “Wire Measurer Tester Unit” is designed to be used to test the functionality of our Wire Measurer devices (Cat. # SUB405 and Cat. # SUB410) and associated wiring harnesses used to supply the output signal of the Wire Measurer to our Audible Display devices (Cat. # SUB420 and Cat. # SUB425) via our Hip Pack Wire Dispensers and our Back Mounted Wire Dispensers.