In-Line Power Adaptor, 12VDC Bias PowerThe Shure UABIAST is an in line adapter that provides 12V DC Bias power to an active antenna or in line accessory when a receiver's antenna input jack does not provide the necessary power. The UABIAST receives power from a wall outlet using a Shure PS24 power supply (included), and passes the RF signal while supplying power to an active antenna or other in line device. It is capable of supplying power to three in line amplifiers (Shure UA834), or two