The Akai LPK25 Wireless MIDI Controller is a compact 25-key MIDI keyboard featuring wireless Bluetooth and USB MIDI connections. The built-in wireless Bluetooth connection frees you from the restraints of tedious cables and tangled setups. The ultra-portable design will fit into a backpack or laptop case allowing you to transport and take the unit anywhere you go. The Akai LPK25 is powered either by USB cable or 3 AA batteries for added portability. The 25-note velocity-sensitive keybed is designed for a natural playing style allowing you to record velocity as well as notation. Octave up and Octave down buttons are also incorporated allowing you to switch between different octave ranges for added versatility.