Av-jefe Vl630-h4p Tan Headset Microphone W/hiroshi 4 Pin for Audio Technica Wireless Microphone System Element : Back Electret Condenser Polar Pattern : Omnidirectional Frequency : 50 Hz - 18,000 Hz Color: Beige-color, Dimension : f5.2 x 144mm RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE.