How long are the USB and HDMI cables that come with the existing product and how long can they go before I get a repeater.

The Cables that come with the Y Series LED are 5ft or 1.5m in length. We recommend a powered repeater if you are going to extend these cables, especially the USB. HDMI can be extended without a powered booster to around 15ft but this differs from computer to computer. We recommend setting up and testing your unit with the cables supplied, before you introduce extension cables. Always use good quality branded cables, not cheap extension cables from eBay….