The Sony UTX-P1 plug-in transmitter is designed for use with the Sony UWP wireless microphone system. The transmitter features a mic and line-level switch for standard wired microphone line-level sources. Selectable output power provides a choice between 5mW output, which is suitable for simultaneous multi-channel operation or 30mW output for long distance transmission. Like the receiver, the transmitter also features 188 selectable UHF frequencies and operates for up to 8 hours on two AA size alkaline batteries. A comprehensive LCD display provides frequency, channel power status and much more.