Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Will closing the case put the Kindle into sleep mode?
Document: The key board functioned but would not put the kindle to sleep when you closed it so the  drained fast. I would put the Kindle down at night and the next day it would be dead.
I love this, because my school has free WiFi for students, and I'll be able to type up papers on the fly using the QuickOffice Pro app. Easy to set up the Bluetooth keyboard. Only thing that concerns me is that it turns on when I open up the case; after closing it I noticed that didn't shut off and I had to hit the Sleep button manually. Might be a battery drainer, so I will keep an eye on that.
This is a beautiful case for a man or woman. Bought it for my husband looks very expensive and works great. It even shuts the Kindle off when closing it.
I also don't notice that the Kindle turns on/off consistently when openining/closing this case, though not a big deal to me. For its intended purpose (making your tablet into a mini laptop that's easy to type on), it's great.
I wanted a keyboard but didn't want the bulk so the detachable keyboard is just what I need. I haven't tested the keyboard thoroughly so don't know if it will sleep by itself to conserve power. I hope so! As other reviewers stated, having a portrait view stand would be helpful (In fairness, only my original kindle cases stood up that way... I haven't seen a fire case that does.)
I love the case way better than the keyboard. Easy set up, but the keyboard is really small. Given it is for a tablet, I do understand. The case is really neat because it turns the Kindle off and on by opening and closing. Good product.
I looked at several cases for my new Kindle. I wanted a keyboard and a stand on the back to prop it up. This case is of a very high quality and it protects the corners. The Kindle was easy to install and the keyboard was simple to sync with it. The Kindle goes to sleep when I shut it and wakes up when I open it. If I don't want the keyboard in there, it is held in with magnets and is easy to remove.
The case holds the Kindle nicely with easy access to all ports and buttons. The keyboard itself was extremely easy to sync and is much easier to type on than the screen mode of the Kindle. It turns the Kindle into a mini laptop. And the fact the keyboard is rechargeable is a big plus.
A very good unit. I am currently typing on the keyboard to write this review.Overall this combination keyboard and protective cover is solid  4.5 star.First the case:  5 starsThe  white case is visually pleasing with closing tab made of red.The Kindle Fire HDX is VERY securely tucked in.
Fits perfectly, case is well made. Love that the keyboard detaches so I can put kindle at eye level and keyboard in my lap.
Answer: yes it does put it into sleep mode but i prefer to power mine off when not in use due to the charging time.