Dobrý deň, nejaký manuál k tomu by nebol?! Predsa len je to elektronické zariadenie, tak zameniť polaritu nieje bohviečo. A na samotnom výrobku nie je žiadne označenie polarity. Nehovoriac o tom že na výrobku sú 2 rôzne konektory opäť bez označenia čo je čo. Ďakujem.
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