Belker 36W 3V 4.5V 5V 6V 7.5V 9V 12V Adjustable Voltage Universal AC/DC Adapter Power Supply for Household Electronics Security Camera Router LED Strip Light Keyboard Tablet - 3A 3000mA Max.

It works perfectly with my bike

I own a few of these power supplies and bought them specifically to wire up a few groupings of multiple Christmas LED strips in the house that use batteries so I could power them instead from power supplies and remote controlled receptacle switches so batteries don't need to constantly be replaced or the need to switch them all off and on everyday by hand. Works great, the light strips can be on all day and have never been as brilliant with batteries and the intensity never fades, the connector containing the binding strip made it a snap and I can save a lot on buying a ton of batteries. Verified polarity with meter to be sure it matches what's written on the binding strip which I would do with every one of these I'd buy to be sure. Using 3 volt setting(for 2 - AA battery in series) and it measured a smidge high but hasn't caused an issue with any of the sets.

I bought this to slow down my Nat Geo rock tumbler after reading about it on a rock tumbling subreddit. It worked perfectly, and now the barrel spins at a slower speed that doesn't bruise and chip my rocks!

Works well for a iFi Defender+.

Was not too sure how well this variable power supply would work, but took a chance as the original power supply replacement was about the same price and hoped this would actually work for several of my devices. Easy to set: Just use small screw driver to set the dial to device voltage. Charged the battery for two different devices so far, and confident it will also work well with the rest of my other devices missing their original charger. Excellent device, good price, and eliminates needing several different power supplies.

Awesome! No more waisted money on batteries for the Hot Wheels tracks.

The product is nice seems to be well made Although I haven’t use it

I use it to power LED signs with 4.5V. (Slightly dimmer than the intended 5V on purpose)