The Trantec Antenna Booster from Toa Electronics is an antenna booster for the S5.3, S4.14 & S4.4 wireless microphone systems. It is designed to compensate for high-frequency loss (cable loss) that occurs when the antenna cable is extended. The frequency band of this antenna booster is G at 606 - 638 MHz. The unit comes with a 1.64' BNC cable and can be used in combination with the optional YW-7520 or YW-7570 wireless antenna.