Korg microKEY Air 61, 61-Key MIDI Keyboard, With Bluetooth for wireless operation on iPad, iPhone, Mac or PC, Compact natural touch mini-keyboard, Pitch Bend Wheel, Modulation, Octave Shift button, Damper pedal connection, Power supply via 2x AA battery or USB, Dimensions (W x D x H): 850 x 139 x 54 mm, Weight: 1.71 kg, Incl. KORG software bundle code as well as USB cable@+*System Requirements Wireless:@+@+*, Mac with support for Bluetooth 4.0 or higher and OS X10.10 Yosemite or higher or iPad / iPhone with support of Bluetooth 4.0 or higher and iOS8 or higher, PC with Windows 8.1 or higher (32-bit / 64-bit) and Bluetooth 4.0 as well as BLE MIDI drivers@+*System Requirements USB:*@+@+, Microsoft Windows 7 SP1 or higher (32-bit / 64-bit), Mac OS: Mac OS 10.8 Mountain Lion or higher, iOS8 or higher