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Excelente producto, excelente acabado y presentación, funciona perfecto, enciende y apaga junto con el receiver conectado al USB, silencioso, imperceptible incluso a volumen bajo y el receiver trabaja mucho muy fresco en la velocidad más baja del ventilador, que impresionante, mega recomendado!

Good quality 👌

今回CDプレーヤーの上部に置いて使う目的でこの商品を購入しました！　これまでは主にPC用に2基連結の12cmUSB冷却ファンを使っていましたが、今回は14cmの大きさの冷却ファンを選択してみましたが、音も想像以上に静かで、風量レベルも余裕があると思うので、Mediumにして使っています。耐久性と安定性は使い始めて間もないので、検証していません。　後は長持ちしてくれると嬉しいです！それから他の方も触れていましたが、連結用のUSBコネクタは、個人的には無くても良かったかなと思いました、いずれにせよ、良い商品だと思います！

Im writing this review during a very HOT unusual few June weeks in Minnesota, its been over 90 for almost 2 weeks now, I have a full size 42U server rack for my home lab, it has a big hole on top that nobody's exhaust fans fit, 21 x 5.5, but the 140mm measurements of this fan is just big enough that I can sit about 4 of them on top of the racks hole. I work in Tech Recycling, so I see what happens to most tech equipment when its removed from service, its rare to see AC Infinity products, I rescued a old AC Infinity Controller they don't appear to sell anymore, but its similar to the one they sell now, and rescued a 2U Rackmount 4 fan with controller unit, I was amazed how quiet the rack mount fan unit was even after many years of use, the LCD controller is a bit hard to read, but other then that it works fine. So I needed some USB fans to plug into the other controller I rescued, I was concerned there was only 2 USB ports, which is the same as new model they currently sell, but when these fans arrived, I saw a lovely daisy chain USB connector, apparently you can have up to 4 of these on 1 of the USB controller ports so those 2 ports give you maybe 8 fans , I don't need that much, but its a nice feature, I plugged these in to the old controller set it on AUTO and away they go. The controller appears to have Low/Med/High setting but these fans also have a 4 way switch on the cord which seems to be 1 notch higher then whats available on the controller, I have them maxed, very light hum, not much more then my laptop fans on a hot day. Compared to others, I have rescued hardwired plug and run fans with no thermostat, that sound like a bunch of servers running, so these are by far the quietest ive heard (almost can't tell they are running), Now that I know they daisy chain, I bought 2 more, with 4 of these at about $15 each vs $300-400 exhaust fans that are usually 120mm, they sell for most racks this is a great deal and larger.Perfect product, not sure how strong they are? they are not as FAT/DEEP as some Ive seen at work, its very hot, my rack runs about 3-4 degrees hotter then the room its in, so even with the fans they are having a hard time cooling it down, but air circulation is always good. its hard to get cool when the room itself is hot upper 80s, and rack is maintaining lower 90s.Only thing I would add to this product,RGB colors would be nice for those of us that like adding colors to our loved computers, but probably wastes electricity and reduces power so maybe its better they don't have color lights. (only if it don't sacrifice cooling power)CLIPS, since Im buying 4 of these to fill that big 5.5 x21 inch hole in my rack that normally a bunch of wires would go through, but in my home lab all wires go down, Im using that hole as a exhaust for the heat to exit up to the ceiling, these cool rubber feet are nice, but it would be nice to clip these together with some kind of clip so instead of 4 loose fans its 1 big fan. The feet are good, but since I have 3 cats that can jump on top of the rack it would be nice to link these fans together with some kind of bracket or clip just in case, not too worried about it, but it would be a nice modular feature.Lucky for me its only hot in Minnesota 3 months a year, so most the year these fans won't have to work hard, but they are running 24/7 now in a near 90 degree room. These would be great for quiet rooms, chances are your normal household fan is louder. Love the product, both the old ones I rescued that were not quite ready to be recycled yet, and these new fans.

The first thing you notice about this Fan is the quality build.The steel cage and rubber feet allow you to put it over, or under nearly anything and have a stable surface.We have this under our Mac Mini (Late 2012 Quad Core i7) and this keeps it very cool, even under full load.The fan has a small, inline speed controller that gives you three speeds of operation and airflow options as well as an off switch. We are using this fan in a Full Time Production Recording Studio Rack. The volume of its operation was the one of the MOST important factors and this delivers. On the lowest setting, directly in front of the grill, the fan is nearly silent. I say almost because we have an Isolation Booth where our rack is located and is completely sound proof. Even the ringing in your ears can be heard clearly under these conditions and in this booth, this fan is still unbelievably quiet ( less than 5dBv )Each additional setting is about twice the airflow and twice the dbv.In practice, this would work very well in most rack applications ( home theater, pro audio ) and never be heard in most circumstances, even under the higher fan speeds.A well thought out product with a quality design and build.S. HartwellOwner/Cheif Engineerfeatherlight Recording Studio

Ich habe gleich zwei davon bestellt um meine PS4 Pro etwas zu kühlen, die bei Horizon Zero Dawn doch passagenweise nervig lautes Kreischen fabriziert. Laut genug um dass ich es selbst unter meinem Headset höre ... klar kann man sagen "Junge, du hast 'n besch***enes Headset" und das stimmt vielleicht sogar, aber dann bin ich lieber froh, dass ich die PS4 noch höre. Obwohl sie schon ein Kühlpad drunter hat, erzeugt sie offenbar so viel Wärme, dass die Lüfter darin annähernd unter Volllast laufen. Das geht natürlich nicht und so habe ich zwei dieser Ventilatoren gekauft.Ich habe verschiedene Konstruktionen ausprobiert, das beste (PS4 ist am leisesten) hatte ich, als ich beide Ventilatoren rechts neben die Konsole stellte und Luft sowohl in's Gehäuse als auch hinter der Konsole entlangfließen lasse. Damit wird die warme Luft, die die PS4 hinten ausstößt gleich wegtransportiert und staut nicht groß auf. Zudem wird ständig kalte Luft in die PS4 geleitet und darunter und darüber wird die Luft auch ständig in Bewegung gehalten, so dass mehr Wärme über die Oberfläche abgegeben werden kann. Man kann die Ventilatoren auch so platzieren, dass je einer auf einer Seite steht, einer pustet die Luft über die Konsole, der andere saugt sie ab ... allerdings war dies nicht ganz so effizient.Zum Lüfter selbst. Man kann mehrere Lüfter nacheinander schalten, laut Bedienungsanleitung bis zu 4 Stück. Man muss dabei aber beachten, dass sie in einer Reihe geschaltet sind. Der erste Lüfter kann ohne die anderen betrieben werden, aber der zweite nicht ohne den ersten, der dritte nicht ohne den ersten und zweiten, und so weiter.Wenn beide Lüfter von allein anlaufen sollen (beispielsweise zusammen mit dem Starten der PS4), muss ich sie von der Geschwindigkeit im ausgeschalteten Zustand (kein Strom über USB) mindestens auf der Stufe "Medium" stehen haben ... und zwar alle beide! Auf "High" geht auch, aber "Low" reicht für den zweiten Lüfter nicht aus.Die Lüfter sind nicht unbedingt "flüsterleise" und man kann sie besonders unter Vollast doch recht deutlich hören. Allerdings sind sie mit "Medium" durchaus schon kräftig und relativ ruhig (und nicht lauter als die PS4 Pro im regulären Betrieb, beispielsweise beim Abspielen einer BluRay).Ich habe diese Lüfter auch testweise mal auf meine Onkyo-Anlage gestellt und zwar so, dass sie von vorn betrachtet hintereinander auf den Lüftungsschlitzen liegen. Der hintere hat Luft hineingepustet, der vordere Luft herausgezogen. Selbst bei niedriger Drehzahl der Lüfter (und dann sind sie so gut wie nicht mehr zu hören, gegen den Klang der Anlage sowieso nicht) wird die Anlage zwar immernoch etwas warm, aber nicht mehr so heiß wie sonst üblich. Der Unterschied ist mehr als deutlich und seitdem steht fest, dass ich noch mehr dieser Lüfter bestellen werde.In einen USB-Anschluss einstecken, einschalten, fertig!Die Ergebnisse bei der PS4 waren nicht überragend aber spürbar, das Ergebnis bei der Onkyo-Anlage war kaum in Worte zu fassen.

I use a early 2009 Mac mini running XBMC as my home theatre PC (HTPC). On top of the Mac mini is a NewerTech (OWC) miniStack V3 enclosure with a 2TB enterprise class drive that serves as the boot volume and network storage. There is a heat sink on the bottom of this drive enclosure but no internal fan. This setup has been running flawlessly for 6 years but both are always VERY warm. The heat sink on the bottom of the miniStack would actually burn my skin. I recently decided to add a 4TB NewerTech miniStack Classic to the top of the stack to serve as a Time Machine volume. I knew I needed some sort of small fan USB or otherwise to cool down the Mac and two external drives.I read a lot of reviews and decided to purchase two of these fans. I am so glad I did. I have one on top of the Mac mini blowing air up at the bottom of the miniStack V3 and the 2nd fan on top of that drive blowing up at the bottom of the newer miniStack Classic. The Mac mini and both external drives are very cool now. The heat sink on the bottom of the older miniStack V3 is cool to the touch. The mac is also much cooler now that it doesn't have a hot external drive sitting directly on top. I have one fan plugged into the Mac USB port and the 2nd fan plugged into the first fan. Whisper quiet and no vibrations. I know the rubber feet won't scratch any of the hardware and there is just enough space between the devices for the fans to cool very efficiently.Update: I've purchased a 3rd fan for the HTPC setup described above. I didn't mention that the movie files are stored on a 2TB OWC Mercury Elite Classic. This has always stood vertically next to the stack of drives and the Mac mini. This volume is now full so I purchased a OWC Mercury Elite Pro enclosure and a 6TB drive. The 4TB NewerTech miniStack Classic described above will now become storage for movie files and the new 6TB volume will be used for time machine backups. I will use this new 3rd fan between the old 2TB OWC Mercury Elite Classic and the new 6TB OWC Mercury Elite Pro. I have the option of standing both drives vertically with the fan standing vertically between them but I will probably lay them down horizontally with the fan stacked between the two drives drawing air from below and blowing upwards.