Item is brand new it comes from Logitech K400 plus keyboard.

The Logitech Unifying receiver is a tiny wireless receiver that can stay plugged into your notebook`s USB port and lets you easily connect up to six compatible wireless mice and keyboards to the same receiver. There`s no need to unplug it when you move around, so you won`t have to worry about losing it.

With a Logitech Unifying receiver you get wireless freedom and convenience without the hassle of multiple receivers.

Its easy to add a compatible wireless mouse or keyboard to the same receiver. And your wireless devices are ready when you need them.

To pair new dongle to your device you will have to download Logitech unifying software from Logitech support website.