Lost usb dongle lenovo ultraslim keyboard

it worked before today, (the other shoe drops, omg did it?>)
then what does detach mean.
it has wires, or what>?
USB can be wires, or bluetooth dongle, i cant see your Tablet

it has battery, time for new battery any time wireless devices like this fails.
1st things first..
2011 made pad.
Model 183825F (this is the tablet # model not keyboard)
Lenovo has zero hits on there web site for this #

but my guess, is the keyboard does not have Bluetooth USB device, ? but is just a USB keyboard.
ok found and old sales sheet in this pad
i see it came with keyboard.
runs Android OS
the only hint is see is in the spec, for docking station
it says supports wireless orig. keyboard.
so if it is wireless. detached, then the battery is dead
easy no, wireless can not run lacking POWER.
no wireless of any kind works with no battery or power supplies

You don't give the model, most late models have Wi-Fi and Bluetooth so it should mate up , go into settings and check it out. If not buy a Wi-Fi dongle for a usb port and use that.

Guys, did you READ the question? Bruce has lost his ONN USB Nano receiver, that is all - he is looking for a replacement.

I searched everywhere, and found no replacements. ONN has a website for numerous ONN replacements items, but no NANO receiver/dongle. I did find a wireless mouse for $.03, YES, 3 cents, at Walmart - it's an ONN brand https://www.walmart.com/ip/Onn-Wireless-Mouse-Fuchsia/292577928

If there are any available at Walmarts in your area, it's worth $.03 to buy it and see if the dongle will work.
Your post is a year old so you may not need one any longer, but if you still have your keyboard and mouse, it's worth a shot. I have lost mine also.

This function is driven by a Lenovo driver for the screen. This is not easily removed. If you were to uninstall all Lenovo drivers that would do it, but it would also remove other Lenovo functions like the volume level indicator on the screen and the Lenovo button, etc.

The thw wireless mouse is paired from fabric wirh USB dongle for same mouse. You can't connect a wireless keyboard to it because they are no different frequency. Actually it's hightly improbable that you even could connect the USB dongle of a mouse with another different mouse. Explanations is logical: presumeyou are in a big office whate another 1 users have wireless keyboards or "mice". Now, imaginge the mess if the dongle of your keyboard should control the mouse of another 9 usrs.
Now, it's competely different with bloetooth keyboards and"mice"
USB Dongle for Microsoft Wireless Keyboard and Mouse 5000

There should be a small wireless dongle that cam with the mouse & keyboard, generally a small plastic piece on the end of a USB connector. Plug this into one of the USB ports in the back of the computer.

Is it a corded or non corded keyboard. Possible problems with non-corded: Dead Battery, no link to USB receiver(dongle) on computer, bad USB receiver (Dongle) on computer. From Lenovo Website:

Keyboard and Dongle Paring:

Auxiliary tools: PC with Windows XP or Windows 7, two AAA cells

Pairing steps:

1. Insert Dongle into PC. Be sure that the Dongle is recognized by PC and the distance between keyboard and the Dongle is within 10cm.

2. Press down F2, F3 and F4 at the same time, install cells, release F2, F3 and F4 and then Press "3" to begin pairing. After finishing pairing, press "Windows" key to check whether the pairing is successful. If "Windows" key works, it means that the pairing is successful; otherwise, the pairing fails.
That was all I could find on the site.
That was all I could find

Logitech Get Immersed in the Digital World

Why can't you just connect the keyboard and mouse to the usb ports on the machine?
You should be able to find the part on ebay or Acer parts for that matter.
I hope this helped.
Good luck and have a fantastic day.

Unless you can find not only the exact part number but a dongle with the exact same serial number its not possible.Having the same issue.I say shame on HP for creating this issue by not wanting to sell type specific replacements to resolve this problem.They would prefer that you buy an entire new set. Good Luck.