I have connected the keyboard to two computers and my Android smartphone. One PC with the receiver supplied, a second with an additionally purchased receiver because neither PC supports Bluetooth 4.0, and the smartphone via Bluetooth. Works well so far. In use in an office environment. Possibly not suitable for gaming.

Included is a USB receiver. I connected the keyboard to two computers (Windows and Mac) via Bluetooth and to a third Windows computer with the included receiver. Works very well, the computer is selected with three buttons on the keyboard or one button on the mouse.