AAA alkaline batteries, rated for 90 hours continuous use, or 168 hours of standby time. Automatic sleep mode saves batteries too!. Size is 29.1 x 9.6 x 1.1 cm, that's only 11.5" x 3.73" x 1/2" when open! Folds to 15 x 9.6 x 2.6 cm, that's 6" x 3.73" x 1".  (less)

additional keys to give you even more control of your Apple IPHONE 4 This newly introduced product has a simplified setup and is the world's only dual standard (HID/SPP) full sized folding keyboard It has a five row AlphaNumeric keyboard using full sized keys that have the quality "scissor action mechanics" giving the user the feel of a desktop keyboard improved driver software and additional keys to give you even more control of your Apple IPHONE 4  (less)

and additional keys to give you even more control of your I9000 Galaxy SThis newly introduced product has a simplified setup and is the world s only dual standard (HID/SPP) full sized folding keyboard. It has a five row AlphaNumeric keyboard using full sized keys that have the quality "scissor action mechanics" giving the user the feel of a desktop keyboard. This Universal Portable Wireless Keyboard² gives the option of both HID and SPP profiles which when combined with our driver software (included) offers the the widest range of compatibility with most of the leading named devices from: Asus, BlackBerry, Dell, P, HTC, i-mate, Nokia and more  (less)

devices - Work with Window 7 / Vista / XP / 2000 - Work with Windows Mobile 5.0 or above - Slim and light weight foldable design - Standard 44 keys QWERTY layout with tactile feedback button - Single AAA size battery requirement - Dimension: Folded size : 117W x 81L x 16H MM ; Expanded size : 233W x 81L x 10H MM  (less)