Instruction: Answer the given question using the supporting document.

Input:
Question: Where would you get the USB micro-transmitter needed for the mini controller??
Document: Love it....I tottally agree with the other review....The tech at bestbuy are mediocre at best.....I could clearly read on the box that it had a USB connection....but they insisted that it would not work with a "regular computer" and that I needed a bluetooth connection....idiots.
The other one looks similar but works with Bluetooth. The mini has a smaller USB dongle, a nub which just a tad bigger than a cat's nose. Once I plugged it, it instantly connects to the mini controller. My PC / HDTV setup is a 42&#34; Vizio and a low profile Dell Zinio.
...I guess I could keep looking for more flaws, but I think that last word kind of sums it up. The Mini Controller is awkward. For what I got, I think I was charged too much. Even worse, I bought it at a significant discount, and I still think I paid too much. I got it for the convenience, though, and not for the cost benefits. I needed a Unifying miniature keyboard/mouse, and I got just that... barely.
I would type a complete sentence and only see 3 letters show up, 10-15 seconds later the enter sentence would immediately appear like the computer had caught up to what I was doing.With the Mini Controller I have never once had inconsistent communication with the computer. I have used this controller exclusively on my new computer build (HTPC) and it is excellent as an input device for all types of control; OS setup/testing, media playback, file transfer, etc.
Both modes have "OK" or "Enter" when you push the center down.While the Mini Controller can appear a bit pricey to some I feel its benefits strongly outweigh the cost and con of an external transmitter. I have compared this device to many others including Harmony Remotes, Rii Controller, Boxee Box Controller, Mediaboard Pro, and full wireless keyboard/mouse solutions.
This device is being used as the interface for an HTPC. A small receiver plugs into a USB port and the computer sees the device as a keyboard and mouse - no drivers to install. The trackpad takes some practice to get used to and isn't always as responsive as you'd hope, but for its size and purpose this is a good choice. The keyboard is small and designed for two-thumb typing, but is good enough for web browsing.
First of all, this works with a PC just as well as with Logitech Revue/GoogleTV!I use it for my HTPC. You can do almost any regular keyboard function with it.It does have a left and right mouse click!The touchpad is really not that great, takes some getting used to.I would buy it again, this was exactly what I needed!
The build quality is classic Logitech. It is thin plastic with some creaking, but if it isn't abused it should last. I'm surprised the charger isn't micro USB like the Harmony remotes. With WMC,  Fn key doesn't seem trigger secondary key features like DVR. That is very disappointing. The track pad is good, but you may not be able to swipe across the screen with one motion.
I use this for my HTPC. My only gripe is that it uses a non-standard charging cable, instead of a standard mini USB cable.Battery life is great, range is excellent.
I use this to run an XBMC-driven Win7 HTPC. The wireless controller has worked great, even at distances of 30'. Since the controller is RF (USB-powered RF), it needs relatively line-of-sight to operate (I originally tried it behind a thin plywood closet, and it didn't catch a reliable signal).Worked right out of the box in both XBMC and Win7, every button just fine (even the fancy mute, pause, etc ones).
Answer: When u purchase the controller it comes with the USB, it's very simple