Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Where is the USb port on this board/lap desk?
Document: Other than being comfortable, when the soft cushion pad is removed it has rubber pads underneath, so that when placed on a desk it will not slide. Finally, the lap desk has a usb fan that helps keep the laptop cool. This is especially "cool" because my laptop runs pretty hot when pc gaming.
This laptop cannot get overheated with this board lap-desk.Although the unit lifts up with about 5 levels, only the lowest one is useful. In the lowest notch you still have to bend the laptop's monitor well past it's typical 95 degrees.This item will undoubtedly go through a number of improvements which will one day bring it to the worthy price of $40 to $50.I bought this because of my extensive neck disk injuries, to save it from being bent too much. It does help.
The lap board is great I love the mouse pad. I can use it from the left or the right side. May 17 inch wide screen laptop fits prefect.
This is a great lap board. It has a fan and an attachable mouse pad. It's sturdy enough and the perfect size for my heavy 18&#34; Alien Wear laptop. Keeps it cool and doesn't add a noticeable amount of extra weight.
This lap board is sturdy and well-made. It is comfortable to use and adjusts easily to any viewing angle. The mouse pad is a real plus for anyone (like me) who is not fond of touch pads. Additionally, it was shipped and arrived in record time. We're completely satisfied.
Aidata LD007P Laptop Cooling Lap Board (Black)This cooling board has useful detachable mousepad, a cooling fan and can be set to tilt a various angles depending upon your needs. It has a comfortable detachable cushion. The whole package is light and comfortable. It's perfect for my needs.
The concept is good and so is the quality. However, the &#34;lip&#34; to keep the laptop I have (HP Premier 17&#34;) appears to be too large and with the board raised @ the slightest angle, my laptop has a tendency to slide over the &#34;lip&#34; resulting in it falling off, hopefully into your lap or the table it's sitting on.
4) it has the fan that can help pull air away from the laptop....granted, it is USB but most things are nowadays and it just drains power from the laptop. it's still a nifty feature to have if you need it.Overall, I recommend this lap board. It has kept my laptop very well ventilated and easier to use when sitting on the couch on a lazy day, too.
Pros : My 17.5&#34; fits perfectly on this lap board, the mouse platform can stay stowed inside the unit if you choose not to use it. The unit seems to be well built. I was looking for something that would hold my large laptop without it having to hang over one side or the other and this unit fits the bill.Cons :  I have yet to find any.
I'm loving it! I'm recovering for carpal tunnel open release surgery, and this board allows me to angle my laptop so I'm not bending my wrists. And I love that I can have it on my lap or even on my coffee table by the couch (which is were I am now). It's light weight, and the ability to detach the mouse pad shelf on the side is wonderful. It has a lip on the front to prevent the laptop from slipping.
Answer: Towards the left but it is on a pretty long cord and you can attach the usb cord for the fan either to the right or to the left.  I have a 17" laptop and I can use either side.  I love this lap desk.