Brand Name : FIFINEStyle : Lavalier MicrophoneTransducer : Condenser MicrophoneUse : Conference MicrophoneCertification : CE,FCCSet Type : Transmitter SetsOrigin : Mainland ChinaPolar Patterns : Uni-directionalCommunication : WirelessPackage : YesModel Number : K031BMicrophone Type : CondenserMicrophone Impedance : 1-1.9K Microphone Sensitivity : -44+-2dB RL=680 ohm Vs=1.5V (1KHz 0dB=1V/Pa)Microphone Frequency Response : 50-16KHzMicrophone Direction : Uni-directionMicrophone S/N Ratio : More than 58dBTransmitter Frequency : 672.5-684.5 MHzTransmitter Radio-Frequency Power : 10dBM/10MVTransmitter On-off Control : Physical SwitchTransmitter Power Supply : 2*AA BatteriesReceiver Frequency : 672.5-684.5 MHzReceiver Sensitivity : -95dbReceiver S/N Ratio : More than 58dBReceiver Frequency Response : 40Hz-15KHzReceiver Power Supply : USB,5VType : wireless microphone/usb microphone/free your handsApplication : podcast/interview recording/youtube /skype/Speech/TeachingFree your hands and mind-USB Wireless System brings the convenience of wireless to your digital communications and PAs.Ease of use, accurate response and lightweight construction allowing you to roam the classroom without having to hold a microphone. ideal wireless system for recording lectures and seminars.Multiple Applications-Plug-and-play operation with no driver installation required.Simply connect the wireless microphone directly to your computer via USB and start working with your favorite DAWs, VoIP communication software and applications for speech-to-text dictation.Compatible with iPads and iPhones (4S and later) using Apple's Lightning USB Camera Adapter(Not included).USB Wireless Microphone System Presentation-Easy pairing for fast set up.Allows you to wirelessly capture stunning audio straight to your Mac/PC.Perfect for audio or video recording, Youtube streaming, capturing interviews, conducting podcasts and classroom settings.Headset/Lavalier Microphone Wireless Systems-Clip on a wireless lavalier microphone for hands-free voice reinforcement.Lav mics are perfect for interviews, as well as live presenters and teachers.Headset USB Wireless System delivers high definition audio for creating videos on pc,laptops or smartphones.Ideal for public speakers, preachers and lecturers and fitness instructors.Interference-resistant UHF band operation.The wireless receiver automatically pairs with the wireless microphone transmitter,set up is as easy as plug-and-play.No interference and stable connection in selectable UHF band.Allows you to provide audio connectionless freedom of movement up to 80'PACKAGE INCLUDE1* Body-Pack Transmitter1* Headset Microphone1* Lavalier Microphone1*receiver1* User ManualNOTICETransmitter power supply : 2* AA batterieThere is no battery in the package