Step Up Voltage Converter Qutaway USB 5V to 9V or 12V Step Up Cable Adjustable DC to Dc Transformer Converter with Switch (5V-9/12V)

This product is made very well. I'm sure it would work for the devices it fits. Sadly the first one I received did not come with the 4 included barrel connectors. The company quickly sent me another unit with the connectors, only for the connectors to not be the same as pictured. I needed the tiny yellow connector and none of the ones they sent were small enough. I can use them for other things I have, but will not work for what I specifically bought them for. Not the fault of the product. It is a well made and sturdy product that does it's job well.

Great value for the money. I bought this to set up a few wireless sender/receivers and camera in my RV. There are USB outlets all over, so this is easier than finding 12v power and splicing in. I was able to power my wireless video receiver and WiFi sender, or a camera and WiFi sender with one of these, so it works great. It does not get hot, and the standard barrel connector plugged right into all of the backup camera stuff I am testing.

Really like it and works just fine - so far so good

Got this to try to run my portable 7" dvd player off a usb battery pack. It does indeed do that comfortably as it only draws 7 watts. If your device draws under 10 watts this will work. Also the universal tips are the same as the ones I got with my usb to barrel cable here on amazon. so you can probably use other tips if the included ones don't fit.

Got tired of buying batteries for all my round-plug electronics, so I picked up one of these. With my 5v/2.1A USB battery I can now charge my mini guitar amp, a photo light and more. This cable comes with positive on the inside, but my mini guitar amp needed the positive on the outside sleeve, so I bought a reverse polarity cable and solved that issue very quickly. Read another review that says that same cable can power guitar pedals too! No more hunting for the right transformer!

I bought this product so that i can utilize my router(using LTE sim) with power bank while on road or adventures. No need to have a wall plug nearby. I use a 10000mah powerbank and it runs the router for 10 hours continuously

The item stopped working after 3 uses... I've very mad and disappointed. Now I have to find another company to order from! What a waste!

I bought this in an effort to standardize my power management systems...essentially everything I own can be charged via battery or usb port...except my zanflare c4 battery charger. This remedied that! No more using the bulky wall plug or having to bring a desperate car charger plug when I'm on the move. Now, like everything else, I can charge my batteries any where there's a standard usb port!