Polar Patterns:Uni-directional Package:Yes Communication:Wireless Set Type:Transmitter Sets Transducer:Condenser Microphone Use:Conference Microphone Style:Lavalier Microphone Model Number:K031B Microphone Type:Condenser Microphone Impedance:1-1.9K Microphone Sensitivity:-44+-2dB RL=680 ohm Vs=1.5V (1KHz 0dB=1V/Pa) Microphone Frequency Response:50-16KHz Microphone Direction:Uni-direction Microphone S/N Ratio:More than 58dB Transmitter Frequency:672.5-684.5 MHz Transmitter Radio-Frequency Power:10dBM/10MV Transmitter On-off Control:Physical Switch Transmitter Power Supply:2*AA Batteries Receiver Frequency:672.5-684.5 MHz Receiver Sensitivity:-95db Receiver S/N Ratio:More than 58dB Receiver Frequency Response:40Hz-15KHz Receiver Power Supply:USB,5V Type:wireless microphone/usb microphone/free your hands Application:podcast/interview recording/youtube /skype/Speech/Teaching Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia