what is the power source? Batteries?
1486378
Three AA batteries According to this link http://techland.time.com/2013/07/25/finally-a-shower-curtain-with-a-built-in-ipad-pouch/
543782
A wire. I can't remember if it took batteries for back up if the power went out. It's been a while since we had it.
1241594
It is battery powered only. It seems to use little battery power, I'm still using the original batteries I installed.
723329
The power supply is an option. It uses a 9 volt battery (not supplied - no surprise there). When the power supply is used, the battery functions as a back-up.
1296885
Not battery powered. Has a transformer that plugs into 120VAC. The transformer output is low voltage AC.
2096646
Battery powered. Not sure about the back lit part since I bought it as a gift
1302426
It comes with a power supply,batteries can be done if you make the power connection but the drain would cost a lot of money. If you use it outside with the right weather proof box I used a solar panel with recharge batteries that work really good.
330004
It is powered only by the 2 battery clamps. There is nothing else included, somewhat of a limiting factor indeed.
1483670
The power source is batteries. Not sure of the frequency, but I would definitely NOT recommend this product. As a front door to inside intercom the volume was so low that it was worthless. We finally just threw them away.
1308444
Built in battery. (I don't know exactly what type of battery it is. I just guess Li-ion rechargeable.)
1878816
I believe it's just batteries, it was a gift for my mom and it won't take any kind of batteries we have found.
231328
Battery - guess it depends on how much you use it. Sorry I can't be more specific
204847
It definitely is powered by a battery but I do not recall if it came with one. I seem to think it requires a 9v. Sorry that I could not be sure.
21038
AA Batteries. Qty 3. (FYI... mine does not rotate under battery power. The colors change though.)
2024458
Yes it uses batteries or you can plug it in (if you get all that come with it.) see the other reviews. I was apparently lucky to get both lol
1054045
This is not powered by battery. It is powered by plugging it into an electrical outlet.
492970
It does not take batteries. You need to find a power source that connects via usb cable. Look up usb power source