I'm selling this because I bought it about two years ago and haven't used it much. There are a few scratches, but since it's hardly been used, there's no functional wear and tear, and I think it's still perfectly usable. The batteries and cable are unopened. ■ MIDI Keyboard - Mini 37-key ・Equipped with a "playable" natural touch mini keyboard, even though it's small. The keyboard uses the highly-rated "Natural Touch Mini Keyboard." The ratio of black and white keys has been adjusted for ease of playing, making it easier to play chords and fast phrases. It's a keyboard designed with a focus on touch and feel. From composing to performing, from mobile environments on the go to the core of a home production system. It flexibly supports a wide range of applications. ・Wirelessly connects to iPad, iPhone, Mac/Windows. The microKEY Air can easily connect wirelessly to iPad/iPhone instrument apps like KORG Gadget, KORG Module, and GarageBand, as well as music production software on Mac/Windows. Thorough tuning achieves low latency and stability. ・Can also be used with a USB cable. Like the microKEY, it also supports USB connection. Connecting to Mac/Windows allows immediate use without installing drivers. It's an all-around MIDI keyboard that can be easily set up in any way, via USB or Bluetooth. ■ Specifications Keyboard: Natural Touch Mini Keyboard Number of keys: Mini 37 keys Controllers: Joystick, Arpeggiator button, Sustain/Tap button, Octave Shift button Octave Shift: -4~+4 USB port: B port Power supply: 2 AA batteries (when using wireless connection, alkaline batteries or nickel-metal hydride batteries) USB bus power (when using USB connection) External dimensions (W) x (D) x (H): 565 x 139 x 54 mm, 1.0kg