It works great. My problem with it is that it is hard to rotate the dial to the desired voltage. I do have another adjustable Voltage Wall Adapter (3V - 15V) but it has a rotating dial knob that is easier to rotate than this one which requires a flat screw to rotate to the desired voltage and the knob in which you insert the flat screw is made of a cheap plastic that is easily deformed and damaged if you use a flat screw that does not quite fit right.

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Product details
This Adjustable Voltage Wall Adapter is an all-in-one solution to powering (the majority) of your projects off a wall adapter. This adjustable wall adapter features a rotary switch on the enclosure that allows you to select the voltage that best works for your system or device. It features an adjustable range between 5 and 15 VDC with up to 45W of power. A MicroUSB and selection of assorted barrel jack tips allows you to easily configure a power supply that works for your system or product; no more looking for a wall adapter you might not have anymore. The adapter also features a USB A port that can provide 5VDC and 2A for needs that require a different USB style.Includes: Wall Adapter with 56 inch Cable Assorted Barrel Jack Tips 2.5 x 0.7 mm 3.0 x 1.0 mm 3.5 x 1.35 mm 4.0 x 1.7 mm 4.8 x 1.7 mm 5.5 x 2.1 mm 5.5 x 2.5 mm MicroUSB Tip Key for Adjusting the Voltage Selection Switch
