In the event that one of your devices does not come equipped with bluetooth, you will need to remember to purchase an adapter in addition to the keyboard. The device, on the whole, meets my expectations, and I have no complaints. Various advantages: Very enjoyable to use, despite its small size and silent operation, and with the ability to easily switch between devices. The lack of support for Logitech Unifying is the most significant downside of this product. Even the availability of a Logitech USB Unifying Receiver is of no use if the device in question does not support bluetooth; in this case, you will need to purchase an adapter for the keyboard separately. As is the case with the keyboard in general, getting used to not having home and end buttons requires some adjustment time. I have almost gotten used to everything, with the exception of the uncomfortable arrows. Because they are so little, it is difficult to find the proper one by touch. I have almost gotten used to everything else.