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In Ear Monitors
This dongle is a 
IEMs or in ear monitors are audio devices used by industry professionals and audiophiles alike.
For advice on buying IEMs from China refer to Chinese stuff general
- BA (Balanced armature)
- Balanced armature receivers have been around for almost a century in many different forms. They are perfect canidates for IEMs due to their low power consumption, small size, and tuning potential.
