LogitechUnifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black

Works great! I'm using it with the Logitech MK850 (keyboard and mouse). The only thing that was tricky was that I couldn't use my keyboard and mouse to pair to the new dongle. Fortunately, I had a laptop which let me do it. Once they were paired, I could switch the dongle to another computer. The computer that uses the new dongle is an Ubuntu machine so I wasn't sure whether pairing it with a Windows laptop would work. It did. I hope this information helps.

Why did you pick this product vs others?:I picked this product because it was rated highly and it was shipped by Amazon with a 30 day return window. Similar item was being offered by another seller for a cheaper price but did not have a return policy. It works perfectly with our Logitech K540 keyboard. As other reviewers have mentioned, the Logitech Unifying Software needs to be downloaded for the receiver to work with the keyboard. Some reviewers have stated that they could not install the Software but it worked for us.

Arrived quickly and great quality. You can never have enough of these in a shared office space. Easy to program and go on your way! Def saves those days you’re in a bind when you left your dongle at home or someone grabbed it by mistake.

I thought I had lost my wireless receiver for Logitech M510 mouse, so I ordered a replacement. The M510 is listed as one of the items this receiver is compatible with. The item arrived in remarkable time, less that 24 hours from when I placed the order. I was impressed! Then, it did not work, and I was unimpressed. I thought maybe I had a battery problem, so I opened the battery compartment, and found my missing receiver. The person who had used my computer earlier in the day had helped me pack up after a meeting, and she carefully stored my receiver in my mouse. I normally leave it in the computer. So, my problem was solved, but not by the new receiver. I am not sending it back because I think that is just a waste of money for everyone. But I do not recommend this product.

Bought this for a K350 keyboard and mouse. You have to download the unifying software for it to pair, but it worked great! We lost the original dongle and I thought I would have to toss the keyboard and mouse. Way to go Logi for creating a unified system

Bought to replace a lost dongle for K400r. It works but I had to install the Logitech Unifying software first and pair the keyboard to it.

Beautiful and functional item and came quickly and l9oks Great would but again

worked great! I can now use an old keyboard with a numeric key pad and save wear on my laptop keys