malletSTATION EM PRO is the expandable, premium quality professional electronic mallet instrument that's ready to take your creativity to places never before possible. Not just an evolution of the original malletSTATION, but a complete departure in purposeful design. Whereas malletSTATION EM1 was designed to be light, portable, and USB-powered for the ultimate go-anywhere mallet controller, EM PRO is all about raw power, ultimate performance, and expandability. EM PRO is built around two separate components that work seamlessly together, allowing you to design the professional performance instrument of your dreams.