The size of charger is bigger than expected, don’t fit to my speakers.
Antwort von runrain- Verkäufer runrain hat auf Bewertung reagiert.- Verkäufer runrain hat auf Bewertung reagiert.
From your pictures, it appears that your device is not authentic.
It's your device that is causing the incompatibility.
If the output voltage and current of the power supply used by the device are the same, you can use a DC adapter or create a DIY DC adapter to resolve your issue.