KORG nanoKEY Studio Bluetooth amp; USB MIDI Keyboard controller Controller : 25-key Keyboard with velocity sensitivity (four velocity curve), 8 trigger pad (velocity sensitivity is supported, four velocity curve), 8 knobs, X-Y padOctave + / - buttons, Sustain button, Touch Scale button, X-Y button, Pitch / Mod button, Scene button, Shift / Tap buttons, Arp button, Chord Pad button, Easy Scale button, Scale Guide button Octave Range : -4–+4 Scene Memory : 8 Connections : USB jack (micro B type) Wireless Type : Bluetooth Low Energy (Apple Bluetooth Low Energy MIDI specification compliant) Power Supply : USB bus power (when connected via USB) Two AAA batteries (when connected wirelessly; use alkaline or nickel-metal hydride batteries) Battery Life : Approximately 10 hours (with the factory settings, when using alkaline batteries) * Battery life will vary depending on the batteries used and on the conditions of use. Power Consumption : Less than 500mA Dimensions (W x D x H) : 278 mm x 160 mm x 33 mm / 10.94 #34; x 6.30 #34; x 1.30 #34; Weight (without batteries) : 471 g / 1.04 lbs. (without batteries) Included Items : USB cable, KORG Software Bundle code, two AAA Batteries for checking operation