The Wireless PRO, Wireless GO II, Wireless ME, and Wireless GO transmitters provide plug-in power to microphones.
Plug-in power is a method used to provide a small amount of electrical power to certain types of microphones. It is primarily used with electret condenser microphones and some other smaller microphones such as Lavaliers or on-camera microphones.
Unlike larger studio condenser microphones that require phantom power (+48V) supplied by a mixer or audio interface, electret condenser microphones require a lower voltage to operate. Plug-in power typically provides a voltage of around 3-5v.
It's important to note that not all microphone inputs provide plug-in power. Devices that are designed to work with plug-in powered microphones will have the necessary circuitry to provide the required voltage. Mixing consoles and professional audio interfaces usually do not provide plug-in power, as they are designed for microphones that require phantom power. In these cases, you can use the VXLR Pro adapter to convert phantom power into plug-in power.