This is a signal converter for older TVs without HDMI input. Very easy to use. Plug the composite RCA cables into your TV and they plug into the converter box, which has an HDMI cable for connecting to any device that requires an HDMI interface. I use Roku to stream TV and get a great picture. The old converter I built often had to be reset. I think the signal was lost due to multiple connections. Highly recommended for use with older non-HDMI TVs.
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