What is the power source ?
1547968
The source of power is battery. When the tip of the pin touches the diamond there is a light on the diamond tester that will tell you if the diamond is real or not. If diamond is the real thing the tester will beep. If not so real you will hear nothing. The diamond tester is a real good. You can carry it in your purse or pocket.
515815
It gets all its power from the computer's bus. It does not need power from an electrical outlet.
1656006
It powers from the power source you measure. It will come with wires to go to system positive and ground. But I really recommend you don't buy this product. I ordered two and they both gave different erratic readings for the 5 minutes they worked. Steer clear of this item.
630042
It both charges and is power source. I think it works fine. No problems since purchase.
1033079
AC power is the primary source and the battery is the backup. FYI I used it for two months with just the battery and it worked fine.
359686
the power source is the recorder itself. they plug into that along with the video cables. the hard drive has to be plugged in.
1497221
Bob, I'm not sure what you mean by "outside power source". It plugs into a regular 110 volt wall outlet, or extension cord running to a 110 volt wall outlet. Hope this helped.
576110
I don't think there is supposed to be power there, I think it is only supposed to switch power you bring in. I'm not positive, but that is how I'm using it.
1978921
no power supply. BUT the batteries you put in there last for such a long time, I am, actually, very shocked and pleased!
2202223
It's bus powered, it draws all the power it needs from the usb port on your pc.
2237836
It's powered by the USB cable it comes with. I'm happy with this hard drive. It has an extra usb power cable if main usb output is not giving it enough power
1398769
This device is not contain a battery. So you will need a fixed power source.
2117298
I have no idea. It's a usb power source. I have used it to charge my iphone and my bike lights. It works really well.;. I have used it to charge my iphone and my bike lights.
286116
It is just a 9 volt DC power supply Powered by 110 ac electric current. That's All!
1177850
I can't directly answer your question but I can tell you that it is equipped with a mini USB connector, both for charging the device and for connection to a device to be powered by it.
183096
It is powered by usb through your computer. No other power supply is needed.
987494
Hi there,The power is supplied through the USB 3 cable by the PC or the Mac.And it works perfectly well.As simple as that.Cheers.Bernard