iKross Bluetooth 3.0 Folding Mini Portable Keyboard for Microsoft Surface, HP, Dell, ASUS, Acer, Lenovo, Sony Android Window Tablet smartphone and more Pocket size wireless folding keyboard Keyboard pairs easily and quickly with smartphones,tablets,laptops and computers. built-in rechargeable lithium battery for continuous working time up to 20 hours and standby up to 22 days. Scissor-switch keys make your typing experience easy and effortless;QWERTY layout with dedicated function keys. Size: 324*106*11mm / 12.5inch x 4.25inch x 0.5inch, 66 KEYS