 This is probably the weirdest product unboxing request that I've ever received. This is for the Cooler Master Sickle Flow, I think they're called the R4 series fans. So I have the blue one as well as the green LED one. I'm gonna start by unboxing the green one although you can see pretty much what it's gonna look like now. And it looks like this packaging is completely sealed. They come into... I'm breaking everything. They come into completely different packages despite the fact that they are the same product except a different color. And I'm not really sure why that is but they do. But anyway, yeah, so someone sent a message to my employer of all people to ask me to do this unboxing. So he sort of sent... he forwarded me this email and he's like, oh Linus, someone wants you to do this. I'm like, oh okay. I mean you could always just send me a message on YouTube. It's a much faster way to get in touch with me. But either way, yeah, here you go. For whoever requested this unboxing, I'm unboxing the fan. You can see that it has one, two, three, four, five, six, nine blades and they're kind of a unique swept shape. I'm guessing that's why it's called Sickle Flow. On the back you can see that we've got our three pins for the power, ground, and RPM monitoring. And then separately around this side you can see the black and green ones that are powering all of the LEDs. It's got kind of a unique construction. It looks like you could almost take this apart and put in different LEDs if you really wanted to. Like they're not just glued in. They're actually... they have little housings that they sit in. Okay, well here, why don't we plug it in? They run at 2,000 RPM and I'll show you the specs in a minute. Oh, I unplugged my power supply. No. Here's a tech tip for you. If you short out the green and the black pins on your power supply, it'll run even without plugging it into a computer. See, it's on. So I'll plug my fan in here and it is green. Look at that. How surprising. So it has a black frame, black clear blades. That's the word I was looking for. Not fins, blades. And the cameraman's pointing at something. I have no idea what he wants. He wants me to hold it here. Oh, okay. Let me see how quiet it is. Okay. It's about what you would expect for a 2,000 RPM fan, but it looks pretty cool. So I'll leave that there and then I'll work on unboxing the other one. So this is the blue version. It looks basically the same except blue. And there we go. Oh yeah, I should probably also show you the specs. Here, cameraman, come stare at the specs for a minute. Okay, so there they are. Okay. Oh, I did that thing again. Everyone gives me a hard time about it when I'm in the middle of unboxing and I like make that weird like... You know what? Maybe I'll just do it just to spite everybody. Okay, here. Let's plug in the blue one. Oh yeah, yeah, yeah. Here. Go look at the specs while I plug in the blue one. So the blue one looks much the same except blue. I think I like the green one better, but I always like green better than blue anyway. So it's exactly the same fan. You got your shiny plastic. You got your shiny LEDs. And here you can see it blowing the Post-it note. No, no, other angle. You can see it blows the Post-it note pretty good. So thank you for checking out my unboxing of the Corsair R4 series fans and I hope you've enjoyed it. Don't forget to subscribe to Linus Tech Tips and also don't forget to check out my other channel NCIXcom. So this is for a couple of reasons. First of all, I called these Corsair fans their Cooler Master. That was a mistake. And second of all, I wanted to show them together in the dark. This is under my desk so I'm kind of camping here and this is what they look like. They look a lot more impressive from the front than from the back. So I would recommend using them as like an intake fan on your case. And yeah, those look pretty sweet. That was it. Don't forget to subscribe.