Music Armor is a compact and innovative MIDI controller worn on musicians' arms. It is ready for use by simply strapping it on. The wireless MIDI system empowers users to musically express themselves under the spotlight without physical constraints. Music Armor emphasizes interaction and coordination between musicians on stage by connecting multiple controllers through sensors. The product is highly customisable with an informative LCD screen and illumination module, providing feedback and supporting the musical performance. The detachable keyboard enables upgrade of hardware.