As the demand was a third monitor to my work PC connect, came a new video card out of the question, because I just a map with 3 VGA ports found. The solution was an external USB adapter. After comparison of all adapters, there were some who for 19.99 euros, I chose 2.0 adapter for i-Tech USB. The delivery was very quick with 2 days. Goods was just as described. The installation had to be carried out without the connected adapter, which was very easy. Then restart the PC with adapter connected, and I already had an extended desktop more - and thus three monitors for software development. The image has very good quality, even when playing videos. The 2 included adapters are very helpful. I therefore give the product 4 stars because everything works great, except for the allocation of resources. When playing an HD video on the third monitor betw. 25 and 30% of CPU capacity used. When playing on the first monitor only 10-15%. So that's about half. System: AMD Athlon II X4 620, 4x2,6GHZ, 64-bit, 12GB main memory with Win7 Home Premium SP1. I highly recommend this product if it does not have to be used in the context of video editing.