These are 2.0 speakers that connect to the computer via a mini jack plug or Bluetooth. They have a separate power supply via a socket (not USB). I bought them in black (total black without white details) and they fit perfectly with the rest of my desk, so I really liked them in terms of color and aesthetics.
Their construction is nothing special. Neither heavy nor light, fully plastic with good assembly. In general, I can't say they are cheaply made; I would say they are a good plastic construction without anything more. The cables are detachable except for the one that connects the two speakers. The mini jack cable included in the package was not of good quality and did not make a good connection, resulting in me replacing it with another one for the speakers to work properly. For me, this was an important downside because I initially thought the speakers were broken and I couldn't figure out what was wrong. Otherwise, the speakers are as they appear in the photo, although I would prefer them to be protected with some kind of cover and not be so exposed. Another small negative for my taste, mainly aesthetic, is that they are large. They have a considerable size for computer speakers; I would have preferred them to be a bit thinner, but in the end, I can't really complain. The switch, which is used to turn them on and adjust the volume, feels good. They have a green light that turns on when they are activated and turns blue when Bluetooth is activated.
Regarding the sound, I can say that the speakers are very loud and definitely "fill" the room; they might be enough for a party at home. I bought them for use with a home computer without particular demands. As I mentioned, they are 2.0, without a subwoofer. They have quite deep sound (I had to play a bit with the equalizer to adjust it to my liking and get used to it), but it is clear even at maximum volume without distortion at high intensity. The bass is quite strong; I can feel it on the desk when playing music. The main speaker also has a mini jack port for connecting headphones, which is very convenient when I want to connect my headphones (there's no need to disconnect the speakers or have a second port). I hadn't thought about this when purchasing, but the presence of the mini jack port for connecting, for example, over-the-ear headphones is an important plus! As for how convenient the Bluetooth connection is, I don't need to mention. It connects to a mobile phone, computer, etc., without any problems and very easily.
I believe that as computer speakers, they fully meet the average user's needs in terms of capabilities, quality, and aesthetics. They are a safe and good choice for their price (under 40 euros), which will satisfy someone looking for decent speakers without having particular demands. After all, there are very few good 2.0 speakers that do not connect via USB and have their own power supply. In any case, the name Logitech ensures a minimum level of quality and performance.
In conclusion, I could say that they are worth the money and will not disappoint the buyer looking for these specific features in computer speakers. They stand out for their strong bass, high sound volume, Bluetooth, headphone port, detachable mini jack cable, separate power supply, and their size.
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UPDATE 15-8-2024: Almost 4 years later, the speakers work as they did on the first day. The only issue that arose was that the power light wouldn't turn on when I opened it. I thought it was burnt out, but eventually, after a while, it worked again! The speakers have been working perfectly for 5 years! In fact, I have them connected simultaneously to two computers in my office (Mac and Windows PC), one connected via mini jack and the other via Bluetooth, and they work flawlessly. My opinion about them remains the same, and I believe that anyone looking for speakers with a mini jack connection and not USB will be completely satisfied. Excellent purchase!