The EMP4SM Electret Microphone Power Adapter from Ambient Recording allows hardwired use of a lavalier mic by converting phantom 48V to 5.6V electret power, and outputs an electronically balanced signal with low impedance. This adapter is designed for use with Beyerdynamic Opus and MIPRO microphones, and converts a 4-pin Switchcraft connector to a standard 3-pin XLR male connector.