Muzen Button and Muzen OTR Metal review: pocket vintage speakers!

Muzen Button and Muzen OTR Metal

Do you miss the past years and the beautiful but bulky vintage radios? If the answer is yes, or if you simply love design products, then Coins has the answer for you! In fact, in today's review we will analyze 2 pocket Bluetooth speakers inspired by the past, but with a hi-tech heart, we are talking about Muzen Button e Muzen OTR Metal!

How did they behave during our tests? Will they live up to expectations? Let's find out together in the article.

Muzen Button and Muzen OTR Metal review

Unboxing - Muzen Button and Muzen OTR Metal

That these products are cared for down to the smallest detail can also be guessed from the sales packages. Muzen Button It comes in a nice blue and orange hardcover box, enriched with beautiful designs and a sliding opening. Muzen OTR Metalinstead, it is sold in a very nice one suitcase in plastic with leather handle and very neat internal sections.

Inside them you can find the following equipment:

Muzen Button

  • Muzen Button;
  • USB fabric cable - Micro USB;
  • speaker strap;
  • adhesives;
  • manuals.

Muzen OTR Metal

  • Muzen OTR Metal;
  • eco-leather case (Travel bag);
  • speaker strap in eco leather;
  • AUX - Micro USB cable;
  • USB fabric cable - Micro USB;
  • Micro USB antenna;
  • manuals;
  • letter of introduction;
  • adhesives;
  • postcards.

Design and construction

These two aspects are the real gems of Coins, in fact we find a design inspired by old vintage radios and giradischi and, despite the small size, all details were treated in detail. We are talking about two well-made gadgets, nice to have and to display on a shelf.

Muzen Button and Muzen OTR Metal


La construction then it is excellent, be it Muzen Button that the Muzen OTR Metal give it a great feeling strength, solidity and quality. Both were made of well-made aluminum with some small plastic inserts. I am sincere when I say that, once taken out of the box, I was pleasantly surprised by the goodness with which they were made.

Le dimensions area of Button I'm from 6.3 x 4.7 x 3 centimeters, so you can also put it in any pocket, while those of the OTR Metal I'm from 8.8 x 6.5 x 5.6 centimeters, or more generous measures which, however, generally remain contained since we are talking about a 5W speaker.

The speakers are equipped with keys to change song or station or raise the volume. In fact, on the smaller one we find a wheel that, if pressed, pauses the songs, while if rotated it allows you to adjust the volume. Through the left lever we can put the previous or next song, unlike the right one which allows us to reset the device or turn it on.

La Muzen OTR, on the other hand, also having the support to FM radio it has a wheel to choose the FM station, as well as two others for volume management and to choose between: Off, Bluetooth, AUX, FM.


Muzen Button

  • Speaker: 4Ω 3W;
  • Frequency Response: 8120Hz-20KHz;
  • Li-ion battery (3.7V / 400mAh);
  • Weight: about 130 grams;
  • Maximum Distance from Bluetooth Source: 10 meters;
  • SNR: ≥ 70dB;
  • Bluetooth version: 4.2;
  • Charging Voltage: DC 5V / 1A.

Muzen OTR Metal

  • Sources: Bluetooth, FM Radio, AUX input;
  • Loudspeaker: 40mm full range, iron-boron-neodymium magnet;
  • Maximum power: 5W with Bluetooth, 2W with FM radio.
  • Battery: 1000 mAh lithium polymer;
  • Net Weight: 426 grams;
  • SNR: ≥ 60dB;
  • Bluetooth version: 4.0;
  • Maximum Distance from Bluetooth Source: 10 meters;
  • Maximum Distortion: 0.5%;
  • FM radio frequencies 87-108 MHz.

Audio and connectivity

Some specifics about the connectivity I have already written them in the previous paragraph, the only difference between the two in terms of functionality is that the Muzen OTR Metal, unlike the Button, owns the FM radio, whose reception can be improved through the micro USB antenna present in the package.

Muzen Button and Muzen OTR Metal

For the rest the former owns Bluetooth 4.0, while the smallest Bluetooth 4.2, not the latest releases, but which do their duty without any criticality. In fact, I have not encountered any problems in coupling with various devices, there is no latency when watching videos, movies or TV series and the range is about 10 meters without obstacles.

Similarly we have excellent performance also with the radio, which has excellent reception even without the aid of the antenna. Obviously this will help us in particularly isolated areas, but if you live in the city or poco outside you will not feel the need.

Muzen Button and Muzen OTR Metal

We come now to the audio, because in the very small body of the Coins we find a speaker from 3W very powerful and that returns a clean sound with well-balanced frequencies. I especially liked the presence of the bass, balanced which guarantees a good listening.

La Muzen OTR Metal instead it comes to well 5W with the Bluetooth e 2W with the FM radio, even here you can see a high sound quality, flanked by an excellent balance of frequencies. The producer has done a good job to offer the consumer the opportunity to listen to all genres with a fair final result.


Another sector in which these speakers are strong is autonomy. There Muzen Button owns a battery from 400 mAh, While the Muzen OTR Metal da 1000 mAh.

Muzen Button and Muzen OTR Metal

With the youngest I arrived around 7 hours music playback continues with volume at 70%. With the Metalinstead, it will be possible to arrive at poco less than 10 hours with volume at 60% and about 4 hours with 100% volume in Bluetooth mode, while with the FM radio mode I could not download it from 9 in the morning until 9 in the evening with volume at 60%. In fact, the manufacturer claims a shelf life of well 20 hours, which drop to 10 with 100% volume.

Both can be recharged through the micro USB port located on the back.

Conclusions - Muzen Button Muzen OTR Metal

After talking at length about their characteristics, it's time to take stock and get to price. Yes, because the good news is that the Muzen Button e Muzen OTR Metal are officially sold in Italy from official store of the brand. The first is available at 64.90 €, while the second can be purchased at 114.90 €, both with free shipping in 24 working hours and official guarantee.

At first glance it may seem that the price is not exactly low, but if you think about it we are talking about two compact products, certainly of design (and you pay for this) made with great quality and with excellent components. In short, these Coins they convinced me and can also be a great Christmas present.