Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Will this work with Surface Pro 2?
Document: I plugged in this smaller power supply and it took me the same amount of time to get a full charge as the full sized pro power supply did - just under 2.5 hours. So even more of a bonus. Maybe it won't charge it as much if you're using it concurrently, but if you just have it sitting asleep and plug it in, this one charges as fast as the larger one that comes with the Surface Pro...
I use the Surface Pro as my Bring Your Own PC for Work. I work for a large tech company as an Engineering Manager and spend most of my time in meetings or moving to and from them. A small device is key.The only issue I had with the Surface Pro when I got it was the charger.
I was not disappointed.The build quality is good and it works well. My only issue with it is that the cable is too short. It's about 3 foot long. I would have really appreciated another couple feet of length, but I can make it work.If you need a replacement Charger for your Surface RT or a travel charger for your Surface Pro, this will fit the bill nicely.
This also works for the Surface 2. This was the original magnetic charger on the original surface but it's working just fine on my MS2.
I like that this one is more like the chargers my Macbook Pros use, folding plug and no second cable to go from outlet to power supply. It *DOES* work great with the Pro, just is supposed to take longer to charge since it's obviously a less powerful PS. The cable from the plug to the power supply is the same length as the one for the Pro, so you only lose the length of the second power cable from the wall to the power supply of the pro version.
I bought this because it is smaller than the 48 watt charger, and for the convince of having a second charger - to keep in my car while traveling out of town. I use it for my Surface Pro, and it works just fine.
The item is exactly as advertised, and we are very happy with the adapter and the service we received. Note this is the adapter for the RT unit, whereas the unit for the Surface Pro includes a USB port for charging your phone or other USB devices.
As a replacement for the main charger that comes with the surface this is my work one. I have never used the main to charge the surface and another USB device so this works just fine to keep her charged while at the office or on the go.. its much smaller and easier to carry around.
I gave it a one start because I hate it. When I first got this charger I had difficulties to get my surface charge. The conditions it came are poor, I had to stretch out the core, its losses up and it stops charging. I'm really disappointed I'm paying for something and getting in return something that doesn't work. It constantly dose it. It makes me not wanting to buy anything from Amazon.
So as long as you're not absolutely requiring that you fully charge up from "forced to sleep mode" 5% charge to 100% in 2 hours or less, this is a much better one to carry around with you.
Answer: Yes.  Works for both.  We own 5 surfaces.  Best thing to do is turn off adaptive brightness.  We easily get 8 hours on surface