AOP-SP70 is a speakerphone converter used in conjunction with Louroe Model TLO Outdoor Speaker/Microphone. It converts the audio signal of the TLO for providing two-way audio with a DVR, IP Network Camera or Video Server. In addition, the AOP-SP70 provides 12Vdc power to the TLO. The AOP-SP70 is used with the TLO Speaker/Microphone primarily for outdoor or harsh environment applications requiring two-way communication with the above listed audio/video receiving devices.