Source: http://simenibiz.com/spy-earpiece-wholesale/1100-china-wholesale-button-cell-...
The system was specially worked out for those special situations when a person needs to communicate secretly.
It is a wireless electromagnetic wave inductive and receiving device, which designed completely according to human ear canal.
It composes a covert signal transfers and receiver system with the electromagnetic wave inductive module.
The advantage is wearing comfortable, compact configuration, simple operation and good concealment.
Mainly apply to the working condition because of expositing earphone and earphone body inconveniently, such as
*antiterrorism
*criminal reconnaissance
*radio broadcasting
*theatrical performances
*law enforcement
*bodyguards
*movie studio sets
*conference operations
*exam and other covert operations
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