Bluetooth Keyboard iKross Wireless Bluetooth Keyboard For Apple 2017 iPad Pro, iPad Air 3, Air 2, iPad Mini, Samsung Galaxy Tablet, Asus, Acer, LG Smartphone and more Brand new Slim Bluetooth wireless keyboard. On/Off button to power on/switch off your keyboard Ultra thin design to maximize your working space. Small, light, and easy to store or take it to go. Easy to clean. Keyboard is Powered by one AAA battery (sold separately). Dimensions: 11.8 x 5.9 x 0.4 inch. May Not Be compatible with Older Android Smartphones : Such As HTC EVO 4G AND OLDER MODELS