It says it operates on USB power, does it use a single USB dongle to do this, or does it use two that must be plugged into two ports simultaneously?
1052512
It uses a single USB plug to power even a 1TB laptop hard drive externally. No extra power needed.
1052513
The Mercury On the Go only requires a single USB connection to your Mac or PC in order to function properly.
35885
It uses one USB port. Five of my coworkers also purchased this monitor and we are all please with it. We are all traveling consultants who use this daily.
2098320
Yes, it has two usb cables. I always plug them both in to my usb ports on my laptop. One I believe is the power, and the other the regular usb connection.
851586
No, it cannot power multiple devices from a single USB port. It is meant for providing the required power to a single USB 3 device, when the power source (e.g. laptop, desktop etc) is incapable of providing the required power from a single USB port.
1317932
It has only one plug, but you can use splitter. Just make sure not to plug too much and overload.
1908220
We do run a phone and a tablet on this at the same time with no problems charging both, as long as one uses a USB, I've never tried charging two devices that both use the dongles, but it should work. It will also charge two USB devices at the same time.
588948
Mine only has one USB port. Power and data are through a single USB cable. Sounds like you would be better off with a unit that comes with an external power supply. More of an opinion than a proven fact. Good luck.
1650671
All I know is this. It is non-powered hub. Works for multiple flash drives *as many as three have worked at the same time for me*, but if you try external hard drives you will run into difficulty because there is insufficient power from a single USB port to run multiple devices that need more power. t
1790399
I have found that you must have two of the ports with a powered up devise attached to make it work. Other than that I have had no problems with it.
305601
good question. mine cuts out with one usb drive but works fine with another. My toy won't work at all unless it is plugged in to power which defeats the portability aspect. :(
1175239
It plugs into one socket on the wall, leaving the other socket free..then it offers on the front two plugs for anything, and 2 usb ports. So you will actually have 3 places to plug in anything and then the two usbs..hope this answers you question..
2211420
You need to plug both in because one transfers data and the other supplies power. If you can only connect one then you need a usb splitter.
161112
Powered by one USB port. Pretty awesome and fast even in USB 2. It's USB 3 cable.
522926
It has 2 USB ports, a 2rd port is slightly smaller than the USB. Sorry, we don't have all the technical information as out IT person is on vacation.
878879
Looks like this price is only for one device---and yes, you do need two of them. I think they work on any computer.... I went to eBay and got a set of two plug links at a great price. (sorry Amazon)
2273585
I have not tried that, to the best of my knowledge no. I have 2 of them & I like the feel & portability. The dongle is so small I leave it in my laptop. I do a lot of numeric input.
1061613
There are 2 power sources. You can either plug in to USB or the wall for it to work.