Tektalk Ultrathin Wireless Bluetooth Keyboard for Ipad Air, Ipad 2/3/4, Ipad Mini 1/2, Iphone, Imac, Windows and Android 3.0+ with Built-in Lithium Battery &ndash; Color Black Bluetooth technologyPress one button to instantly toggle between typing on your Macbook, iPad, iPhone and other devices with Bluetooth Low-profile, whisper-quiet keys: Ensure comfortable and quiet typing. Operating distance: within 10 meters, bluetooth signal is weak in three meters away Convenient to carry: Pencil-thin, sleek profile (0.23in thin) easily stows in a backpack, messenger bag, or case. Package contents: Ultra-Thin Bluetooth Keyboard Cover, USB power charging cable, User guide.