Av-jefes CM518LS Headband Headset Microphone with 3.5mm Lock-Screw Connector Package only include the Headset microphone (3.5mm connector) with one winsdcreen attached. (Bodypack transmitter not included) Element: Electret Condenser RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE. Detachable headband & Cord Length: about 46" 3.5mm Locking-Screw connector compatible with Sennheiser wireless system system and all 3.5mm mono lock screw connector wireless microphone system