May someone tell me the truth? Thanks!

[Bingo]

I've finished this game and watched all 4 endings, but I am really confused why the detective was wearing an ear phone (or hearing-aids? I'm not sure...Both of two make no sense for me) What was the intention for using it? First, the detective was the sister of the boyfiend of jana, so she got the revenge by acting as a fake detective with no possibility to have an audio link with other partners all the time. So I don't think the ear phone is
for communication. Second, the detective voluntarily removed it later. So I don't think it was her hearing-aid. Third, I guess this ear phone was used to monitor the room where jana had been kidnapped. But it is totally my suspicion without any evidence. Can anybody tell me the truth? I would really appreciated.

[Rhinotales]

Well... Actually the hearng-aids she wears is just a fake props of her Detective character. To look odd to distract her enemies.

[Bingo]

Thank you very much, I greatly appreciate for your answer! When I saw the heroine leaned against the executive desk and modified the volume of her gadget, I was really distracted and fooled, HAHA.

[emily_008]

Thanks for the answer, I felt exactly the same way - good to have clarity on that. :-)

[Мумия]

whaaaaat? In what universe hearing-aids is some detective stuff?