Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: What size batteries does the remote require?
Document: I am very pleased with this Sony table top stereo system. I am particularly pleased with the sound which is very good for its size. The IPOD charging drawer is a little qwerky to open and there are no guides for the unit that you are charging so it is just supported against the unit itself with a rubber bumper.
It also has a remote. No USB, though and being android users, we use the Aux in and haven't really utilized the Apple connector. Regardless of this limitation, this is still a great buy.
This is perfect for small room (not for a big house).Sound is good. remote sensing is good.negative point: not easy to see top control. It depends where to you store it...
I love my new music system. The sound quality is good. I was surprised to see that the system included a remote control. It was easy to set up. I love it.
The sound is fabulous - all coming out of this relatively small, sleek black music system. Works well with my iPhone. Remote is easy to program and use. I love the multi colored dot indicator which is white, red, green or blue to indicate CD, Radio AM/FM, iPod/iPhone etc.
We wanted a smaller music system/radio that we could easily move to different rooms. It includes an FM/AM radio, iPod/iPad dock, connection for other phones/pads and a CD player. The remote is easy to use. My wife took it out of the box and started using it immediately. If you are looking for a system for a high shelf, the top display would be undesirable.
The remote is pretty well layed out & easy to use as are the function buttons on the unit.For what we bought it for I think it's just about perfect. I DO wish it had a plain old usb port so that we could play mp3 through it, but it does not & I won't ding it for that because I knew that when I bought it.How does it compare to a Bose Wave radio? I have no idea! I've never been able to spend that much on a rado!
Well, sound is great, looks modern and stylish in any room you place it. I love that it has both FM and AM Radio. Some may argue that the ipad/iphone dock is outdated but who cares? I am not a consumist puppet though I am happy with my Ipad 3 and Iphone 4s and will not change then untill they stop working as I wish. 4 stars because it does not have a USB port which otherwise will have made it perfect.
We needed something for my wife's nightstand that would give her access to am/fm radio & play CDs. I searched and read reviews for a couple of weeks. I'd looked at this one early on & in the end found myself coming back to it. Thing is, we don't own an I-anything, so the I-dock is of no use to us.The sound is big and clear.
This little unit has great sound and would recommend it to everyone. The CD player words great and the radio portion tunes in great with this unit being located in my basement.
Answer: 2 AA, they must have come with it because they are a Sony brand