Home Hi-Tech Audio / Video / TV / Streaming ,,,,, Cyber Layman tries the C1 nano spy earphone, the kit including a bluetooth necklace, which literally disappears inside the earphone cavity. We tried wearing one: here's how it went and what we think.
What is a spy earpiece? 
Let's recap briefly. The nano earphone C1, although it has commonalities with traditional earphones, is different in many respects, among all the size. And in fact, it is a practically microscopic earphone, which when inserted into the ear cavity is practically invisible to those around you. Hence the spy earpiece function, which substantially differentiates it from all other standard solutions on the market.
How C1 works
We have already explained how a micro earphone works; we invite you to read the article dedicated to micro earphones to better understand the features. As already mentioned, the correct functioning of the spy earpiece C1 is dictated by a magnetic induction system, having to be coupled to another device called an inductor. In this case, the inductor is represented by a bluetooth necklace, on which there is a control keypad that allows you to better control the device in all its functions.
The necklace, included in the sales kit, allows the headset to function properly, because it is this that induces the signal by creating a magnetic field like that of magnets.
It is the inductor that connects, as we will see later, to the smartphone via bluetooth, and it is always the inductor that contains a small amplifier that increases the power of the output signal, before making it reach a copper coil, from which the magnetic field is generated.
Finally, the micro earphone that is “immersed” in this magnetic field reproduces the sound. Easy to understand, then, why we always talk about a bluetooth micro earphone kit, and not just a micro earphone. The induction micro earphone needs the inductor for correct operation. 
Package contents
Having made the necessary premises on the functioning of the product, the sales bundle is composed of the active micro earphone and the Bluetooth T-LOOP necklace, inside which there is a 4 watt amplifier, Bluetooth 4.1 CSR module and microphone that therefore allows you to perform a telephone conversation.
Activation of the spy micro earpiece
Activating the spy earpiece is really simple. First of all you will have to insert the battery of the micro earphone, unscrewing the small cap and then screwing it back on, taking care to turn the part of the battery with the black circle towards the earphone itself.
At this point, hold down the “Answer and send call” button for about six seconds, until the blue and red LEDs start flashing alternately. It is the signal that the bluetooth micro earphone kit is being paired. Now, from the bluetooth menu of the device it will be sufficient to click on T-LOOP and finalize the pairing.
Technical specifications
Below we summarize the technical characteristics of the spy micro earpiece:
Functionality of the keys
While the spy micro earpiece remains comfortably inserted in the ear cavity, invisible from the outside, the necklace has the real control keypad. By double clicking on the call button it is possible to dial the last number contacted; the same key obviously allows you to answer and hang up a call.
The same keypad also includes an SOS button, which when pressed sends an acoustic signal to the interlocutor, a short acoustic signal to the interlocutor. With the Volume buttons, on the other hand, it will be possible to raise or lower the listening volume in the micro earphone, while to turn off the necklace simply hold down the call button for 6 seconds.
Obviously, even after it is turned off, the necklace will remain saved in the phone as an associated device, so the next time it is turned on, just press the call button for 3 seconds and at the first blue flash the pairing will take place automatically. During our tests the pairing between micro earphone and smartphone was always done correctly and instantly.
Audio file playback
Although the spy micro earphone is not designed primarily for listening to music, it is still possible to use it to listen to music using the media player of the paired device, or even other streaming music services. Also in this case the remote control will allow you to manage the different music tracks and the volume.
Loading and maintenance
To recharge the necklace, the inductor necessary for the operation of the headset, simply use the battery charger included in the sales package. The supplied cable is equipped with a micro jack to be inserted into the necklace; the bundle also includes a wall socket, but it will be possible to use the USB cable to recharge it in other ways as well.
A red LED will light up indicating that the upload is in progress; once turned off, the necklace will be fully charged. The same manufacturer recommends a thorough cleaning of the ear before use so that the headset is preserved over time and maintains its acoustic qualities unchanged.
Use and use
As already mentioned, the spy micro earpiece has several features. It allows you to make telephone conversations, or even listen to music. The volume of the earphone, of course, is not as loud as that of normal in-ear headphones. It is normal that this is the case, since it is a spy earpiece it will have to remain absolutely invisible from the outside, not only from an aesthetic point of view, but also from an audio point of view.
The volume is of course sufficient to perfectly distinguish words and music, but not so high that it can be heard outside. Furthermore, although it is possible to listen to music through the headset, we do not feel we recommend it for this exclusive purpose. For listening to music it is possible to turn your attention to other solutions, even less expensive.
And then, the spy micro earpiece has its main function in invisible conversations. We can hypothesize its use during conferences, in the theatrical field to obtain suggestions invisible to the viewer, it can still be used in safety areas, for catering occasions, and more generally to carry out free hands telephone conversations, without others. notice. We omit, for obvious reasons, the “unorthodox” and unethical uses, such as the possibility of receiving suggestions during competitions or exams.
Conclusions
It is not a traditional headset for everyone. If you just want to listen to music you can buy standard solutions for a few euros. The C1 spy micro earphone with bluetooth necklace is a professional solution to be used in specific areas, and which allows you to receive invisible suggestions in the ear. Yep, the micro earphone is smaller than a dime and hides perfectly inside the ear cavity.
The micro earphone kit with bluetooth necklace can be purchased directly at this address at the price of 134 euros.
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