MyVolts Ripcord 7.5V USB to DC Power Cable, Center Positive, 1.5m, Black, 1 Count

This is an outstanding little device. It produces enough power to use a Sony A7s as a webcam, directly from the USB port of a macbook pro. Attached is a photo of a Sony A7s, Camlink 4k, and a RODE microphone, all connected and powered by a single USB port on a macbook (via an Anker usb 3 hub). As another reviewer noted, it does not provide enough power for the Sony A7s to take photos, but video is totally OK.

This kept my A7S running for several hours uninterrupted, which was all I asked of it. A note, though: the amperage this supplies to the camera body doesn't seem to be enough to activate the A7S's shutter, so taking pictures with the manual shutter on the A7S will basically turn the camera off when using this converter. Video, though, seemed just fine.

There was nothing I didn't like about this 7.5 volt adapter power cord that I used from my power pack to an internet radio. It made the productive connection I needed

Bought it for my Hercules RMX 2 DJ Console. Was afraid it wouldn't work because of the amperage rating (RMX 2 is rated at 1A, while this adapter delivers 0.84A). It works however flawlessly and i couldn't be happier with the adapter. Now i can run the RMX 2 of an USB Power Bank and have a portable DJ setup. :)