Model IF-PX is a single zone POE in-line interface designed to extracts power from an Ethernet connection to power Louroe microphones, speaker/microphones and external devices that require a 12Vdc supply such as Encoders and Non PoE IP cameras. The IF-PX supports both one-way and two-way audio. Most commercial grade line level unbalanced microphones are compatible with this unit. Audio output has variable gain control.