There appears to be a systemic issue with the processing of this product. Each device I tried presented different problems. The overall functionality of the product was good, but due to issues, the review score dropped sharply. Unit 1 arrived and worked fine for about a week. After the first week, the 2 keyboard/mouse USB ports stopped working - so I had to resort to a shared USB port conveniently located next to it. I could live with that, but it removed one of the features I chose KVM for - the ability to switch from the keyboard. I was forced to reach out and hit the switch on the front panel. With a crowded table, it wasn't ideal. So I ask Revain for a replacement. Block 2 came and immediately showed the lack of video output from some ports right out of the box. This is with the same cables etc from the 1st that previously displayed the output correctly. Called Revain immediately for a refund. It would be a good product if they could build it properly. Since Unit 1 works correctly initially, I hope this unit works "correctly" every time, but I've now switched to a different KVM switch.
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