This MIDI Keyboard Controller features 32 mini-keys with a portable, compact, and lightweight design so you can bring it with you anywhere with ease.
Completely WIRELESS Experience.
Compared to its predecessor, the AKM320, the AKM320 BT sports a Bluetooth function for a wireless connection to popular devices like the iPhone or the iPad. It can be powered either via the USB port of your sound engine host, OR with two AA batteries for a COMPLETE wireless experience, both power and connection wise.
MIDIPLUS miniEngine Pro External USB Stand Alone Sound Module 128 MIDI Sounds 64 Tones with Battery Pack - Intl
MiniEngine Pro is a portable audio source which can power the keyboard. It looks very cool, small, and exquisite. It has a built-in 128 of the latest high-quality GM sounds. Quick effect features include Volume, Tone, Reverb, Panning, and Vibrato (can be adjusted optionally). The sound module supports USB and MIDI interface to connect to MIDI keyboard simultaneously. It has a maximum of 64 polyphony output, and supports 24/bit/48KHz high-quality output. The USB host can provide USB 5V 500mA current output, and it can also function as a mobile phone emergency charger