Ezprogear EZH860 Headset Microphone with 3.5mm Lock Screw Connector Headset Microphone with 3.5mm lock screw (Bodypack Transmitter Not included) Compatible with Audio2000s, Awisco, Pyle and Nady Wireless Microphone System Element: Electret Condenser Impedance: 600 ohm Cord Length: 30" (about)