exactly what it says on the tin, but with no instructions... It's brilliant! It has all the features it says, but there is one small issue which, while not affecting performance, does inconvenience:
On the packet it does not say which way round you have to install it as the fan can be for intake or exhaust, so I had to plug it in before I could screw it in place. So you don't have to, here's how it works: when the "antec" writing in the centre of the fan that does not move (on the sticker) is facing out towards you, then the fan is pushing air towards you... more info
Does the Job Not very exciting, but it is a high quality fan which is reasonably quiet in operation. The LED's look nice in my case and match the other fans (I have a Antec P900 case)