Motorola Original BDN6708B: Push-To-Talk Interface Module. This is the Interface Module for the EMS Push-To-Talk. Factory Mutual Approved.This Interface Module to be used with Ear Microphone System (EMS) BDN6677, BDN6678 or BDN6641. Fits: For Models: XTS1500, XTS2500, XTS3000, XTS3500, XTS5000, HT1000, JT1000, MT2000, MTS2000, PR1500. THIS ITEM IS INTRINSICALLY SAFE ONLY WITH THE RADIOS LISTED NOTE: To avoid confusion, for ordering purposes, the suffix letter after the stock number is not listed.