This M-27/LOK is a Single Wire Surveillance Earpiece parts. The M-27AC/LOK features Snap Lok System which allows the user different options for ear piece style, Partial Coiled Cord, Snap Lok, In-Line PTT, Clothing Clip and 2 wayRadio Connector.

E-43C Listen Only Earpiece is concealable, lightweight.Situational awareness is critical for police in a dangerous encounter. An earpiece allows officers to hear communications clearly and prevent bad guys from hearing what could turn the situation against them. Crystal clear sound is directed to your ear only so that you can hear it, but the bad guys can’t. Available for 2.5mm, 3.5mm, 3.5mm threaded audio jacks. Please check your radio equipment carefully to select the correct audio jack size when ordering.