Sony UTX-P03/K33 (UTXP03K33) XLR Fitting UWP-D Microphone Transmitter . The UTX-P03 will attach to any 3-pin XLR microphone giving phantom 48V phantom power and converting a wired mic into a wireless one.
It operates over a wide frequency band (up to 72 MHz bandwidth) and combines the reliability of an FM carrier signal with the superior sound quality of digital audio. Improvements are most noticeable in transient responses which are far more accurately resolved. It has a large clear LCD display and automatic channel selection, plus a micro USB connection for power supply and input availability.