A roll-up, pocket-sized keyboard that can be used with any mobile device boasting Bluetooth would seem like the perfect solution for commuters and travellers. The Mini Roll-able Bluetooth Keyboard (HK$197.49, hk.mobilefun.com) weighs a fraction of a laptop or desktop keyboard, and is easy to pair with any tablet or smartphone. However, despite being highly portable (it's no bigger than a couple of smartphones when rolled-up) the flexible keypad proves difficult to type on. It's too easy to make mistakes, and some keys need hitting twice, although this is still a reasonable option if you only intend to type occasionally.

If you're not a fan of putting your tablet in a protective case, the Belkin QODE Ultimate Pro Keyboard (HK$1,298, belkin.com) is probably not for you, although its one-piece design is as impressive as it is productive. The killer feature is a backlit keyboard, which is very useful in dimly-lit aircraft cabins. The iPad can be supported at two different angles, while it can also simultaneously attach to two devices. Typing is easy, although not quite as refined as on the Logitech, with flat keys prone to slippage and mistakes.