Nicky Dicky features the The XK68 and PERST 4 Clone for those who are in tight budget when looking for IR devices... "I take an in depth look into both the XK68 and Sotac PERST 4 to show you performance and use. You're taking a gamble with build quality with either one, but if you take the risk, either should work in a pinch. Just keep those receipts for a quick return if necessary."