The keyboard connects to devices using Bluetooth technology, and as a result, it's capable of working with virtually every smartphone and tablet on the market. It can be connected to up to two devices at the same time; thus, if you have it connected to your tablet while typing an email, and you get a message on your phone, with the push of a button you can switch to your phone and type out your reply.
While open and in use, the keyboard measures (opens in new tab) 295.1 x 125.3 x 5.75 mm (L x W x H), but when folded over, the keyboard is only half as long (147.6 mm). Although it becomes twice as thick (11.5 mm), the folded size is much more travel friendly.
Foreseeing this keyboard getting a lot of abuse while being carried around, Microsoft tried to ensure the keyboard was durable enough to hold up to being used on the road. As a result, it's spill-resistant, and when folded, the keys and internals are protected by the outer fabric shell of the keyboard.
The keyboard also promises excellent battery life, with up to three months of use on a single charge.
If you are interested in trying Microsoft's Universal Foldable Keyboard, it costs $99.95 with free shipping, and you can snap one up on the Microsoft Store (opens in new tab).