A previously bought charger in "lower priced" had been plugging into the outlet a strange buzzing sound of at the first. That was not uneasy about us. I almost sent it back again immediately. It was no longer about getting the appropriate model.
That's why I then ordered this original device. No hum ... And the best: if you have connected the phone for a while to the device, the battery is fully charged. Toll.
So all good. Better than buying the stock would have saved time.