Avjefes Cm518h3f Headband Headset Microphone for Akg, Samson Element: Electret Condenser with Impedance: 600 ohm RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE. Cord Length: 5 ft (Bodypack Transmitter Not Included) Compatible with AKG Transmitters: PT40, PT45, PT60, PT61, PT80, PT81, PT400, PT450, PT2000, PT4000 Compatible with Samson transmitters: AL-300, CT3, CT7, VT2L, UT1L, T32