The IF-4 Audio Interface Adapter is designed for connecting up to four microphones to a DVR or other recording devices that have multiple audio inputs. The unit contains dual outputs for accommodating either and RCA input or a 3.5mm input connection to a DVR, IP network camera, video server, etc. In addition, the IF-4 receives wiring from the microphones, provide phantom power and contain a variable gain adjust per output to prevent the over-driving of the DVR, etc.