The adapter is perfect for charging a new Water Filled Flosser.
Why are sonic toothbrushes made with usb connectors? Well they are and without this connector it would have to be recharged outside the bathroom. This was the only company selling this essential plug. Yes it was a bit pricey but it will last for years and is indispensable. Fast delivery.
Does exactly what it is supposed to do, I bought this to charge my electric shaver, it also charges my toothbrush. A very useful and adaptive adaptor!