DigitCont USB 5V to DC 12V 4mm x 1.7mm Power Cable, Compatible with Echo Devices, USB Voltage Step Up Converter Cable, Power Supply Adapter Cable, 1 feet, DC 5V to DC 12V Cable (White)

Small, compact eliminating another transformer plugged into my outlet. I have installed receptacles theat also have USB ports to deal with clutter.

yep

Is it short? Yes. Will or power on a new echo dot 3rd gen? Yes. Can you do anything with it other than ask for the time? No. Try to play music or ask a question that requires a long answer and it reboots. Tried 4 different USB plugs. All 3.1A at 15w or higher. I even ordered some new USB wall chargers that were 40W and that still wasn't enough. Avoid these. They don't work.

I am using 3.1A usb charger and it works very well to supply my echo dot

For those wondering if this works with the USB's the wall plug adapter holder, Yes it does work. Will bump up the rating after a few months. Just got it so I don't know if it'll work for long or not. Other than that it's pretty good!

I put our echo dot on the outlet shelf I bought previously and the original code was just too long. This works great with the dot on the shelf. I'd highly recommend it.

I’m sure it’s perfectly good for some Echo devices but it is NOT compatible with my Echo Show and it’s now being returned

Excellent! Does the job. The only down side, the stick that mounts to the wall is not sturdy and falls off, but can be replaced.