Does this work with the K400?

The one I received wouldn't pair with a k400r keyboard, but did pair with two different k800 keyboard and m310 mouse. I used the unifying software which does see the unifying receiver but would not detect the k400r although two other unifying receivers would. Needed to swap the receivers around to get all devices working.

will this work with bluetooth headsets

No, this is not a bluetooth device.

Will this work if I am trying to utilize 1EA wireless KB and Mouse with 2 different PCs?

If I understand your question correctly, you want to use one keyboard and on mouse on 2 different systems and you want to purchase a second unifying receiver for the second computer. I'm a quadriplegic and I have a desktop at and a laptop for one I am in the hospital or elsewhere. I have just enough movement in my columns to run a trackball and I have a helper who can type on the keyboard, when it is necessary. I have defined receiver on each computer. I use an M 570 trackball and K 800 keyboard, both Logitech of course, and both specifically designed to be compatible with the unifying receiver. In the beginning, I simply swapped the unifying receiver from computer to laptop because somehow my second defined receiver had gotten lost. (I should stress that the trackball and the keyboard were purchased couple years ago and, as you know, Logitech has advanced their design in wireless keyboards. Anyway, my equipment from couple years ago ran fine on the desktop and when I switched unifying receiver to the laptop it also worked fine, no problems whatsoever. However, when I purchased the second unifying receiver a short time ago I found that, with my older keyboard and trackball, there was not instantaneous compatibility. I had to go through the setup program and have receiver " recognize" both wireless devices. I don't know if this is just one of the vagaries of my systems for if it carries through to all the new Logitech unifying receiver's. However, I found swapping out unifying receiver was an acceptable task for me. All I had to do was tell my caregiver to move the Logitech dongle from the desktop to laptop, an effort which took no more than 15 or 20 seconds. It is entirely possible that Logitech is dealt with the problem I experienced and that they have eliminated it from the newer hardware and software, however, I can not say so definitively. You'll just have to try it out. I do however feel very comfortable saying that if you swap the unifying receiver from one computer to the other you will probably have no problem whatsoever. If you want to go with a second receiver in your other computer, you just have to try and see the works. I can tell you this much: don't have both computers on the same time. I did that without thinking about it and I can tell you that absolutely did not work. I had to be running one or the other. Now, when I switch from one of the other, I do a complete shutdown of one before I turn the other one on. If I do that, problems disappear entirely. I'm sorry I can't be any more definitive , but that is my experience. I will say this: before I became a quadriplegic Logitech was the only keyboard/trackball, but I was satisfied with. I think they make great stuff , and I'm locked into their equipment. I have thanked my lucky stars that I can move both of my thumbs enough to run a trackball, because their design is perfect for me and my physical capabilities. I am on my computer as much as 10 hours a day and have been for years. All I can say is, I have never had a significant, much less a difficult problem with Logitech equipment or software.

is it compatable with 't650 wireless rechargeable touchpad'?

Yes according to Logitech the T650 is a Unifying product You will just need to bind it the first time.

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Reviews

C**J

Perfect Receiver easy to use!

This USB receiver worked perfectly! It connected my keyboard just as it was supposed to and was super simple to set up! No more small laptop keyboard for me!

21.02.2026

A**F

Works great with K400+ keyboard, but...

Lost my keyboard receiver when I left it on a remote computer. Ordered this replacement after confirming on the Logitech website that it would work with my K400+ keyboard and trackpad. Received dongle and plugged-in. It did not work right out of the box. I read the very tiny info sheets that came with the receiver to no avail. Finally Googled and went to the Logitech website. For a Mac computer, you can program the receiver via software that you can download. I really wish Logitech had better instructions with the receiver and on their website. But, in the end works great - even at 1/2 the cost of a new keyboard, lol.

13.11.2025

O**A

Beware!! Doesn’t work for all Logitech devices.

This will not work for a Logitech mouse. It is smaller than the one I wanted to replace. Cannot be returned. All instructions and wording on packaging is in Chinese. Don’t waste your money and buy it. There is no return on this item. Worst purchase I have ever made on Amazon, highly disappointed.

12.02.2026

J**Z

Works!

Product works super well! Compatibility with my Logitech Mouse was great! Very easy to use and pair with your device. Simply make sure that your device and the receiver have the same tag before buying this product. Also, download the app for the Logitech Unifying Software first before you get this product!

12.12.2025

H**E

Works fine but instructions are all in Chinese. It's clearly for the market in China not US.

Works fine. Pairing multiple devices and switching between them is good. The box is half English, half Chinese, but the instructions are completely in Chinese with no English version included. Not tailored for the US market. Knocked off a star for that, but the product itself does what it's supposed to do.

3.02.2026

L**H

Works great

Worked perfectly when I downloaded the Logitech unifying software.

18.01.2026

A**N

whatever

excellent

15.02.2026

K**V

WASTE OF MONEY----DOES NOT WORK AND AMAZON WILL NOT PROCESS A RETURN!

Does not work AND when I processed a return, received a message the item is NOT eligible for return. That was not advertised on item. Does not connect universal Logitech keyboard to my laptop---and directions are not in English. Complete waste of $15.

15.02.2026

P**N

Great device, but need to find the right location to download the application, the link given does not exist.

1.06.2024

R**N

Working fine. It did not come in Logitech packing so that seems to be a drawback although it seems to be a genuine product. Had to download a software from logitech website and it immediately recognized my wireless keyboard. Essentially i had to buy this because i seem to have misplaced the wireless receiver for my KBD. Since it support up to 6 devices it might be helpful in avoiding a clutter with other logitech wireless devices I may use.

1.05.2015

B**.

compatible with Logitech devices that use the Unifying receiver - my MX Master keyboard and MX 2 mouse. NOT the newer Bolt devices. Lets me use my mouse and keyboard on two devices.

20.04.2023

C**S

Llegó un día antes. Solo hay que ir a la página de Logitech y bajar la aplicación Logi option+ y listo. Fue fácil y ya estoy cómodo con el uso. Lo recomiendo, muy buena opcion

31.08.2025

M**R

Works well. Easy to pair.

27.05.2023

ASIN	B0058OU8VY
Customer Reviews	4.0 4.0 out of 5 stars (12,088)
Date First Available	June 29, 2011
Is Discontinued By Manufacturer	No
Item Weight	0.32 ounces
Item model number	LGH_C-U0007
Manufacturer	Logitech
Product Dimensions	0.75 x 0.6 x 0.25 inches

C-U0007 Unifying USB Receiver for Mouse and Keyboard, Connects up to 6 Devices

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