Sometimes there are situations where you need to talk to someone without attracting anyone’s attention, especially in one of the most common situations – exams. Although Bluetooth-headsets are used for these purposes for quite a long time, but the risk of being noticed by the examiner remains high, especially for those students who do not have long hair.
In this case, the transfer of the verbal information can be concealed by an earphone, which the manufacturer calls the smallest in the world. In fact, headphones are quite conditional – it can be perfectly placed inside the ear. Small size is achieved due to the device which transmits the audio signal directly to man’s audio analyzers, using the so-called “passive” vibration.
Despite the fact that the headset does not need any built-in speaker or battery, it is a part of the whole system. For it to work you should put on the induction transmitter (which is easily hidden under clothing), as well as a supersensitive microphone cover for the withdrawal of the alarm. You can even hear the whisper at a distance of several meters while using a microphone.
In addition, a part of this system is a button to transfer an audio alarm on the air, which aligns with the help of a long wire and is usually placed under big toe. Headset supports Bluetooth technology and can be used with mobile phones and other devices that support this technology, up to a distance of 10 meters. The whole system operates with a battery or a rechargeable battery.
In other words, you cannot only write what your friend dictates you on the phone during the exams, but also hear hints at seminars and workshops, as well as eavesdrop on other people and use the system in other situations. The size of this device is only 6,2×7,8 millimeters, and the system can be purchased for $170.
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