Logitech Easy-Switch Bluetooth technology: Press one button to instantly toggle between typing on your Mac, iPad and iPhone. Range: Upto 30 feet (9 meters) of your devices Sharp, bright backlit keys: Type easily, even in the dark. Keys are always easy thanks to the auto-adjusting illumination. Rechargeable: No battery hassles. Use the USB cable to recharge, even while you type. Hand proximity detection Specially designed for Mac: Compact and slim with a real aluminum finish and familiar Mac layout. Type more comfortably: Unique Logitech keycap design for comfortable, whisper-quiet typing Introducing our new keyboard for Mac, iPad or iPhonea beautifully designed keyboard with one touch easy-switching. Type an email on your Mac, then quickly switch to taking notes on your iPad or replying to a text on your iPhone, by simply pressing one button. Keys are also sharp, bright, and always easy to read thanks to auto-adjusting illumination which dims or brightens depending on the amount of light in the room. Even recharging is convenient. Simply plug in the USB cable and recharge even while you work. Wired/Wireless: Wireless Maximum Wireless Range: 33 ft Connector/Port/Interface: Bluetooth.