The Revolabs HD XLR Plug-on Transmitter is intended for use with Revolabs' HD Series Wireless Microphone systems. The HD XLR plug-on transmitter features a female 3-pin XLR connection and converts any dynamic microphone to wireless. The transmitter is also impervious to Radio Frequency (RF) interference due to its shielded construction. The internal rechargeable battery is capable of powering the transmitter for up to 9 hours on a single charge.