Too many wires in your studio? Are they literally holding you back from the freedom of different configurations and setups?KORG, creators of the best-selling microKEY series and the next-gen microKEY2 series can help you break free with the new microKEY Air series of wireless MIDI controllers! Specifications Keyboard Natural Touch mini-keyboard microKEY Air-37: 37 keys Controllers microKEY Air-37: Pitch bend wheel, Modulation wheel, Octave Shift button Octave Shift microKEY Air-37: -4 – +4 Connections microKEY Air-37: Assignable switch jack, USB Type B (x1) Wireless Type Bluetooth Low Energy (Apple Bluetooth Low Energy MIDI specification compliant) Power Supply Two AA batteries (when connected wirelessly; use alkaline or nickel-metal hydride batteries) USB bus power (when connected via USB) Power Consumption Less than 100mA Battery Life Approximately 30 hours (use alkaline batteries) Dimensions (W x D x H) microKEY Air-37: 565 x 139 x 54 mm/22.24" x 5.47" x 2.13" Weight (without batteries) microKEY Air-37: 1.0 kg / 2.21 lbs. Included Items USB cable, KORG Software Bundle code Operating Requirements (wireless connection) Windows: Windows that supports Bluetooth 4.0 or later, and has Windows 8.1 or later (32-bit / 64-bit) [KORG BLE-MIDI Driver is required] Mac: MacOS 10.8 Mountain Lion or later iOS: iPad/iPhone that Supports Bluetooth 4.0, and has iOS8 or later installed Operating Requirements (USB connection) Windows: Microsoft Windows 7 SP1 or later (32-bit / 64-bit) Mac: MacOS 10.8 Mountain Lion or later iOS: iOS8 or later