The Solo Series Tabletop Boundary Wireless Mic with RF-Armor from Revolabs is for capturing audio. The tabletop microphone can be used in various environments for applications such as podiums, desktops, boardrooms, conferences and more. It features a frequency response of 100 Hz to 6.8 kHz and is designed to single out noise caused by Radio Frequency Interference (RFI). The operating range is 65 to 100' and the mic is built with an out of range alarm to alert you when going beyond that distance. The Solo series microphone runs on a lithium polymer battery and can operate for up to 8 hours talk time on a full charge. 128-bit encryption means no one will be able to listen in on the signal sent between the microphone and base station, (sold separately). Cut the cord for the freedom of mobility during audio and video conferences."