The Seismic Audio SA-U24BP is a high quality replacement bodypack transmitter fully compatible with all Seismic Audio wireless receivers. Simply plug a Seismic Audio lavalier or headset microphone into the mini-XLR jack link the transmitter and receiver and you are wireless. The included LCD screen shows important information like the chosen frequency and the battery power indicator. A red LED on top of the unit gives you a visual cue that the unit is powered on and ready to go. A simple belt clip on the back makes sure you�re able to go completely hands-free. Capable of transmissions up to 400 feet and built to produce a crisp and reliable signal the Seismic Audio SA-U24BP is perfect for expanding a current Seismic Audio wireless system to include a lavalier or headset option.Whether used as a spare or a replacement for the Seismic Audio wireless systems this bodypack does the job and will stand the test of time. Please note these replacement transmitters are best used with Seismic Audio Wireless Microphone Systems.