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

Input:
Question: Does this keyboard have a Power key (On-Off-Sleep)?
Document: Excellent Mac keyboard for the price, delete key is a bit loud and made of light plastic. Works great with my Macbook Air.
It is a keyboard. You push the keys and things happen. Kind of what you expect from a keyboard. It is large enough  so I don't land on more than one key at a time. I hate writing these reviews.
Bought to save wear and tear on Apple bluetooth keyboard, plus it has 10-Key. Works great whether using OSX or Windows on the 2012 iMac. Price is definitely right.
This works great with my Mac. It's plastic, and not as nice as the expensive Apple keyboards. However, this keyboard has more key travel and I find it more comfortable to type on. I've had it for two months, and it works great. No yellowing or anything of the sort.
Why in the world would you have the default of f1 be &#34;Quit the current applications?! F1 has been know to be know as the help key on windows. My elderly father keeps hitting that's what it does and this keyboard just upsets him. I looked around online to disable it for him but I couldn't.
If you're looking for a Mac-like keyboard but don't wanna pay triple the price, you won't find any better than this!! The key action is phenomenal, the shortcut keys are very handy, and the elevation of the keyboard is quite comfortable. Been using it for a couple of months now and I have ZERO complaints! I won't use any other keyboard now :) Macally for the win!
This keyboard works nicely and is excellent for what I need it for, the only things I could complain about would be that there is a force quit button right next to the escape key and I've accidently hit it a few times, and that the arrow keys are strangely placed pushing into the main part of the keyboard. However both of these issues are simply a matter of getting used to the keyboard.
A full size extended keyboard which fit perfectly under my hands and on my slide-out shelf. A Mac layout but with my favorite additional key, the forward delete. It is a wired model so I don't have to be concerned with dry cells. It didn't take long to get use to the short-tap keys. I also appreciate the board-colored protective sheet.
This keyboard is decent, especially for the money. The key action is nice, as is the tile style keys.However, there is no provision to raise the top of the keyboard up (ie flip up legs). It does have some moderate rise, but for me it isn't enough. Easily fixed with a small wooden slat, but still wish it would just have flip up legs like every other keyboard on the planet :)Wouldn't buy another one knowing this.
I purchased this in an attempt to save a few bucks over the original mac keyboard. Unfortunately you get what you pay for. This keyboard is VERY slow in recognizing which key has been pressed, to the point that it is unusable for me. The construction is very cheap, which may be part of the problem, and it does not lay flat on the desk, always wobbles a little bit. This one goes back and I will pay for the original, at least there I know what I get.
Answer: The keyboard does not have a power/on off sleep button. It is powerd from the usb connection.