Pros: Incredibly quiet and efficient. Pumps out air like you'd expect and so far I've had no issues with it. Comes with plenty of accessories such as splitter cables, extensions, screwless assembly, etc.

Cons: there are only two things negative you can say about this or any other noctua fan. and that is simply the price and the ugly color scheme. that's it. But you get what you pay for.

Overall Review: worth it. Can't imagine buying any other fan for my pc.

Pros: works fine, short range, multiple devices. Used it for my ps4 controller, and never had any issues with it till....

Cons: .....it died. Only after a few months of usage. There's no excuse for this, and from what I've been reading a LOT of people are having this happen. I'm now using the bt-211, which i think is an updated version of this one. Hopefully they worked the kinks out. cannot recommend.

Overall Review: Died after a few months. Speaks for itself.