Covert Surveillance PTT microphone has an easy-to-locate PTT button that activates silently for privacy, offers unmatched compatibility with listen only earpieces, and links directly to Motorola APX series radios. Combine with the new Covert Surveillance Earphone (sold separately) for a complete radio communication solution for patrol officers, tactical, surveillance, undercover, fire, EMT, elite security, executive protection and more. 3.5mm Listen Only earpiece not included. Compatible with Motorola APX, APX1000, APX2000, APX3000, APX4000, APX4000XH, APX5000, APX6000, APX6000LI, APX6000XE, APX7000, APX7000XE, APX8000, APX8000H, APX8000HSRX, APX8000HXE, APX8000XE, APX900, SRX2200, XPR6000, XPR6100, XPR6300, XPR6350, XPR6380, XPR6500, XPR6550, XPR6580, XPR7000, XPR7000E, XPR7300, XPR7350, XPR7350E, XPR7380, XPR7380E, XPR7500, XPR7550, XPR7550E, XPR7580, and XPR7580E radios.