Does this keyboard comes with a USB connection too? or the only power supply is to use AAA batteries?
885480
Power by AAA batteries only. We do have a similar bluetooth keyboard that built-in lithium battery and come with a charging cable. Please go to below link. http://www.amazon.com/gp/product/B00I1HF2IO
1660368
None. The power is provided through the USB cable. Connections to keyboard amount to USB cable, optional sustain pedal, and optional MIDI cable.
1322567
The mouse and keyboard combo: Comes with a standard usb that connects to the computer. The mouse has the on off switch to save battery life. To my knowledge I have not found a usb port on the keyboard itself to power external devices.
916302
There is a mini usb port on the keyboard, but it is only used for charging the battery of the bluetooth keyboard. You can't, for example, plug a USB mouse into the keyboard and have it function.
1388296
It uses 2 AAA size alkaline cells...normal batteries. They last a long time. I use this keyboard with my Win8 tablet and my android phone.
495628
No, there is no battery involved, it just runs off your tablet's mini USB port. I don't use mine enough to be able to tell just how much current it draws, but it seems like a very minimal amount; I've never drained my device while using the keyboard.
1918062
None. But I've used a cheap, unpowered multi-port hub with a mouse, headphones and this keyboard without any problems. Might struggle if you want to run an external DVD drive or something though, in which case plug the power-hungry thing directly into your computer and use the hub for weaker things. Or get a powered (AC plug-in) hub - they aren't that expensive.
1002619
Bluetooth connection only. USB cord is only for charging and the keyboard doesn't show up on USB.
843956
Not sure what you even mean by this, but the keyboard actually requires a power source so no.
698666
The mouse is a cordless, short-range bluetooth device that functions on regular disposable batteries. It has a convenient on/off switch on the bottom so that it won't waste power when you're not using it. It will not, and literally cannot, waste your USB port. The keyboard is charged via the USB port, but in my experience, holds a charge for a very long while under light to moderate use. I tend to charge the keyboard only about once a week. It is also a short-range bluetooth system though, so excluding charging time, it leaves your USB port free for use.
515803
it connects via bluetooth. the keyboard is recognised by the device when bluetooth is on, the usb cable is for charging the keyboard. it works very good.
2125146
No. You simply plug it into your computer and the keyboard receives power from the computer. I hope that helps.
198999
No, it's strictly Bluetooth. The included USB cable is for charging only. You can connect the keyboard to your computer and type while it's charging but cannot connect to type. Hope this helps.
136061
The one I have came with a USB cable for charging but it stopped holding a charge after about 6 months. It still works but always needs to be plugged in to the computer which then supplies power directly. Defeats the purpose of bluetooth, but does function. Amazon says I bought this, but the description doesn't look like it - mine definitely does not take AAA batteries. There was only 1 or 2 models when I got it, now there are many, and I don't think any match what I have.
1334110
It uses a standard miniature usb cable. The connector to the keyboard is about 1/4" wide and about 1/16" thick.
1051603
Both Mouse and keyboard get power from batteries. The USB dongle connects both keyboard and mouse to computer but does not provide power.
199001
It comes with a usb cable and you can use it while hooked up. It lasts for several days without having to charge it. great keyboard.