In the box - Matias Folding Keyboard, carrying sleeve, users manual : Dimensions - Open 18 x 5 x 0.87 : Closed - 10.08 x 5 x 1.38 : Weight - 15.3 oz : Bluetooth models require computers equipped with Bluetooth wireless technology and either Mac OS X 10.2 or later (for Macs), or Windows XP or Vista (for PCs).