http://www.amazon.in/gp/offer-listing/B0148NPH9I

Multi-device Bluetooth keyboard: Universal keyboard for typing on all your computing devices*: Windows, Mac, Chrome OS, Android, iPad, iPhone, Apple TV 2nd or 3rd generation (*Any Bluetooth-enabled computers or mobile devices that support external keyboards with HID profile. Check with device manufacturer for details)
EasySwitch: Connect up to three devices simultaneously and switch between them at the touch of button
Compact mobile keyboard: Easy to carry around your home for familiar typing in any room
OSadaptive: Automatically recognizes each device and maps keys to give you a familiar layout, including shortcuts
Two year battery life*: Virtually eliminates the need to change batteries (*Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary.)