The CME Xkey 37-Key USB Keyboard is a simple to use but powerful MIDI controller. Slim stylish lightweight and durable the Xkey-37 is 20 percent lighter than a MacBook Air making it the perfect travelling companion. 37 full size keys give you three octaves of playability and creativity and with octave + and – buttons you have a full range keyboard at your hands. The new XCable enables you to get the proper keyboard performance you have been looking for by offering MIDI out Sustain and expression pedal inputs. Features 37 full-size keys (3 octaves) 100% MIDI compliant Velocity sensitive Polyphonic aftertouch Pressure sensitive Pitch bend and Modulation buttons with continuous MIDI control data Octave +/- push buttons Sustain button USB Powered (no external power supply needed) Firmware upgradable via USB Configurable via Xkey Plus free app for iOS Mac OSX and Windows Specifications Power Consumption: ~ 125mW / 25mA Connections Micro USB connector (cable provided) Activity indicator LED Xport connector (proprietary Xcable provided) MIDI OUT (DIN-5 through Xcable) Sustain Pedal input (6.35mm (1/4″) jack through Xcable) Expression Pedal input (6.35mm (1/4″) jack through Xcable) Dimensions Width: 553 mm (21.77 in) Height: 135 mm (5.31 in) Depth: 16 mm (0.62 in) Weight: only 880 g (1.94 lb) – 20% lighter than a 11-inch MacBook Air! Whats in the box? Xkey37 (37 keys) Xcable (with MIDI OUT expression and sustain pedals inputs) Micro USB cable User Manual 2 Years Warranty