Check the listing for details. Headset Mic Headworn Microphone Double Earhook for Sennheiser Wireless. Condition: New. Listed at 29.99 USD. Headset Microphone w/ Omni-directivity capsule flexible boom -compatible w/ Sennheiser Wireless Bodypack Transmitters************High Quality************Description:This double earhook headset is Professional & New Design with beige color, omni-directivity capsule and back electret condenser microphone (effectively eliminate noise scene, improve voice gain). The headset microphone has flexible boom and users feel more comfortable. It is perfectly used in Concert, vocal, speech, dance and sport applications, also for instrumental artists and solo entertainers. Features & Specifications:Element: Back Electret CondenserDirectional Characteristics: Noise CancelingFrequency Response: 100 Hz ~ 10,000 HzSensitivity: -66 dB +/- 4dBImpedance: 2000 ohmOperating Voltage: 1.0V- 10V D.C.Connector: 3.5mm Screw Lock Stereo Cable Length: 40 inches Shipping:Free shipping to U.S. via USPS First Class Mail. Items will be shipped within 1 business day after cleared payment received. Return Policy: We accept exchange or refund for defective item within 30 days after the buyer receive it. We are responsible for the return postage.