The PSRE373 is the first touch-sensitive portable keyboard in the PSRE range, featuring 61 keys, 48 note polyphony, 622 Voices including 3 Live! Voices, 4 Sweet! Voices, 6 Cool! Voices, 11 Super Articulation Lite Voices, brand new DSP effects, 205 preset Styles, 154 preset Songs, 150 arpeggio types, KEYS TO SUCCESS with other lesson functions, duo mode, Easy Song Book for download, compatible with Rec'n'Share app, USB to Host & Aux input (stereo mini jack), Melody Suppressor for both analogue and digital audio input, 2.5W + 2.5W Amplifier & 12cm x 2 speakers.