SOKOO 220v to 110v Voltage Converter, International Universal Travel Adapter, 4 USB Ports (1 USB C) Step Down Power Converter Adapter Combo with UK/AU/US/EU Plug Adapter

Merci beaucoup ! Thank you very much for taking the time to answer me ! I do have a step down converter 110/220. Nowhere I can find specifically 100v. It may indeed be the reason of the malfunction I've also thought about it. I have this coming from the us I hope it will be better than the old fashioned one I'm using right now : SOKOO 220v to 110v Voltage Converter I'll update here when I would be able to try it.