The Smart Receiver
It has to be said that the Bluetooth receiver is quite ingenious. It is tiny and can be used in two ways. For a desktop computer, it stands upright on a small base with a fairly long USB cable, so you can put it more or less where you like. For a laptop, there is a little USB adapter, so all you have to do is plug in the receiver, which takes up no more room than a USB key. It is probably better to use it with a laptop because on a desktop, it's always easier to use a proper, ergonomically-designed keyboard and mouse than the integrated keyboard and touch pad.