Alesis Recital 88-Key Beginner Digital Piano with Full-Size Semi-Weighted Keys and Power Supply Exclusive to Amazon - The ultimate beginners digital piano loaded with 5 expertly crafted voices (Acoustic Piano, Electric Piano, Organ, Synth, and Bass) and powerful educational features that guarantee to have you playing professional keys fast! Universal Responsive Feel - 88 premium full-sized semi-weighted keys with adjustable touch response to suit your preferred playing style Connectivity Covered - Built-in 20W speakers deliver room filling sound,  (6.35mm) sustain pedal input (pedal not included),  (6.35mm) stereo headphone output for private practice, included power adapter and stereo RCA outputs to connect to a recorder, mixer, amplifier or any other sound system Powerful Educational Features - Standard, split, layer, and lesson modes with 128-note max polyphony and Built In FX: Chorus, Reverb Learn Piano Today - Includes Skoove 3 month premium subscription for expert interactive online piano lessons.Minimum System Requirements:Windows: 7 (32 and 64 bit),OS X : 10.8,USB 2.0 port (or higher)