The "Matias Wireless Aluminum Tenkeyless Keyboard - Space Gray" is a slim, aluminum, wireless (Bluetooth) keyboard with a similar layout to the familiar Apple Wireless Keyboard. It has two features that enhance your experience compared to the regular Apple Wireless Keyboard:

It has a rechargeable battery with a typical battery life of 1 year before needing charging.

It has the ability to pair to three Bluetooth devices at the same time, and easily switch between the three devices with the press of a button. Now you can use the same beautiful, great-feeling keyboard for your Mac, iPad, iPhone, Android, or PC; the keyboard even pairs with the optimal layout for each type of device, so when you switch between devices, the keyboard layout is what you expect.