Microsoft Universal Mobile Keyboard

https://www.behance.net/gallery/19852809/Microsoft-Universal-Mobile-Keyboard

With the Universal Mobile Keyboard, getting stuff done while you're on the go has never been easier. Power through emails, put together a proposal, or instant message with a friend. It doesn't matter if you're on your tablet or your smartphone—the Universal Mobile Keyboard was designed to work with iPad, iPhone, Android devices and Windows tablets1. Pair with up to 3 devices with different operating systems and easily switch between them.

http://www.microsoft.com/hardware/en-us/p/universal-mobile-keyboard