This model of the Fox listen only earphone is designed for law enforcement officers, firemen, EMTs and other professionals who wear their radio with a microphone on their shoulder or clipped to their shirt. If your mic has a 3.5mm jack, this earphone will click into it, providing you with the ability to securely hear broadcasts without everyone else in the area over hearing. This is great when you are in a restaurant and do not want to bother other diners but even better when you are making an arrest and do not want the suspect or others to hear every broadcast.

EAR PHONE CONNECTION Fox Acoustic Tube Listen Only Earphone with 3.5mm Connector (EP1089SC):

Tube Style – Black Long Coiled Tube
Connector Type – 3.5 mm connector
Connects to – Speaker Microphone