Logitech MX Keys Mini Wireless Keyboard

Purchased the Pale Grey/White colored Logitech MX Keyboard used. Package came in time with no issues. It was in it's original packaging with no dings, dents, or damage to the package or keyboard, it looks brand new out the box. Unfortunately it was missing the Logi USB unifying receiver I checked the box to make sure it wasn't rolling around at the bottom but nothing was found. Thankfully I have a Logitech mouse that has a Logi USB receiver already in my PC and it connected with the keyboard. If I didn't have this Logitech mouse I would've returned the keyboard for the missing USB receiver. 1 star deducted. Overall types smoothly and is low profile which makes it comfortable to type on. The sound when typing is not loud, my old gaming keyboard is mechanical so it was loud when I typed. This keyboard is much quieter. The keyboard color matches my Desktop setup see pics. It looks better then my black gaming keyboard I've had for over 10 years. It was time for an upgrade. This feature I am about to talk about might not be an issue to some people because I don't find it an issue but rather an annoyance/inconvenience at most. Still it's worth noting this feature. I notice a lag time in response with the keyboard when you first press on the keys and it would take a split second or two to recognize that I'm typing on the keyboard so I would have to re-press the key again to start typing. I would forget sometimes about this feature and would start typing and realize I've typed my word entirely wrong and have to retype the word because of the lag time to wake up the keyboard I thought it was a glitch but it's not and all the updates have been updated for the keyboard. Because it's a wireless keyboard Logitech develop a way to conserve the battery by basically letting the keyboard go into idle/sleep when it's not in use. Once you touch any kepad it will wake up and connect itself so you can start typing. Because of this feature which I find can be annoying for those who are working on the computer everyday and need to have a responsive keyboard for work might want to steer clear of this keyboard. For me it's not a major issue but rather an annoyance at times. I'm learning now to press the keypad once first to let it wake up and then start typing. I'm not always on the computer so I can deal with this. Since this feature can be either an annoyance I decided to drop another star hence the 3 stars. The Logi Options+ app should have a setting for the keyboard were we can choose a time to have it go into sleep mode or to turn the sleep mode feature on or off entirely. The battery might drain quicker if left on but that should be a decision for the owners to decide on usage of the keyboard. That would have been much better if Logitech did that. If I would have purchased this brand new with all items in the box (USB) and the sleep mode feature was able to be turned on/off this keyboard would be a 5 star keyboard. I hope Logitech updates this.