Insert an external audio signal into an HDMI or DVI signal path with the Sescom SES-AUDIO-N-HDMI Audio Inserter. Using the Audio IN Select feature, switch among three different audio input options: HDMI, Optical, and L/R Analog. Insert stereo and multi-channel surround sound signals while extending the HDMI signal.</p><p> Embeds external L/R analog or optical audio into HDMI signal<br /> Integrates audio and DVI video to HDMI signal output<br /> Replaces audio in the original HDMI signal with other input sources</p><p><strong>Please Note:</strong> The unit is open and used but is in perfect working condition.</p>