Antenna for wireless microphones Compatible with wireless microphones in the 470-960MHz range. 50Ω BNC input Compensates for loss from extended cables by increasing gain up to +12dB. For shorter cables, it can be set to -6dB to avoid overload. I was able to use it without problems up to about 30m. There are scratches, but there are no issues with use. It has urethane to protect the antenna wire. A case is included for safe shipping.