This mobile Bluetooth keyboard from Microsoft is undoubtedly one of the best looking keyboards around. Meant to be used over Bluetooth with tablets and laptops, it is easy to pair and comfortable to type with. The keyboard uses two AA batteries and there is a Bluetooth key to free the pairing. The Keyboard 5000 works smoothly with the iPad and has a curved bottom, which the company claims encourage natural posture while typing. Although it doesn't weigh much, it is dimensions doesn't make it comfortable to carry around.