... 10 meters.*The Keyboard can also work for windows, for Mac, for Linux, for iPad, for iPhone 4G, for iPhone 3GS if upgraded to IOS4.* ... .*Easy operation, need no drive, just plug and play.*Ideal for students, business persons, travellers, etc.Specifications:-Bluetooth standard: Bluetooth ... : 493g-Package weight: 606g Package Includes -1 * bluetooth keyboard for ipad 2 case -1 * USB Cable -1 * User book