The Sony UTX-B2 is a wireless body-pack transmitter for the UWP series wireless microphone system. Users are able to choose from 5mW output, which is suitable for simultaneous multi-channel operation or 30mW output for long distance transmission. The transmitter features selectable RF-output level providing added signal strength at long range. The body-pack transmitter features 188 selectable UHF frequencies and operates up to 10 hours on two-AA size alkaline batteries (10mW output power). An LCD display and a 3.5mm input jack is switchable between mic and line level signals.