If you’re looking for a portable and slim bluetooth keyboard to work with your iPad or iPhone, Microsoft Universal Foldable Keyboard is an attractive offering. The keyboard measured just 5mm thin in a foldable design, is capable of Bluetooth 4.0 connectivity and works across iPad, iPhone, Android and Windows tablets and phones. It has a built-in rechargeable battery for up for three months usage for each charge. In addition, the full-size keyset is designed to be spill-proof. Pick up Microsoft Universal Foldable Keyboard over here.