Bluetooth Receiver, 2.4 GHz Ultra Stable Wireless Receiver Adapter, WIFI Nano Receivers Dongle for Logitech Unifying Wireless Keyboard M215 M235 M325 M545 6 Channel 6MM

Didn’t work at first but I then downloaded the Logi Unifying software and it took less than a minute to set up my K400+ keyboard.

Amazing, just install the unifying software and then follow the 4 steps and your done. So easy and simple

Couldn't pair with my mouse or keyboard so not usable for me

Official receiver for the MX3 mouse kept disconnecting so bought this as a replacement. Plugged it in, loaded Options+, added the new device by turning the mouse off and on, and removed the old adapter. Updated the firmware afterwards and is working great!

Good replacement as mine got damaged. Didn't work straightaway as I found out I had to replace the battery in my solar keyboard then it was fine. A bit expensive just for a little adapter but works fine.

Great product, very easy to use. After a quick installation of driver software i was able to use my mouse once again. I was gutted when I first lost the orygina dongle from my trackball. But it is back to its former glory. Happy days.

Perfect for replacing a knackered Logitech receiever. Pairing the new sensor to my trackball was as easy as downloading and installing the software from Logitech's website. Everything was paired and working again in a few minutes.

It was clearly a knock off as the markings weren't the same as my original logitech receiver, but it seemed to work ok. Lasted 14 months, then died. Not sure it's worth it, since it's actually slightly pricier than the genuine Logitech product, which I would hope would last longer (check the Logitech website).