If mini Spy Earpiece invisible headset for cheating have bad sound low/poor quality or high noises

If when you test mini spy earpiece or your hidden headset unseen invisible earphone, sound have low intensity, or quality for voice of your helper is bad or you hear high noises inside ear/earpiece, ceck this video to see what you can doo for solve problem. Why sound from cheating spy wireless earpiece is to low?

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