Product Description ALM320LS is ALM320L with sound version; Keyboard Controller, The keyboard remain compact design but more stable on the desk also small enough to easy carry out, so you can edit music everywhere. GM compatible but improved piano sound sets also drum sound 32 keys / velocity sensitive / three triggered / mid size key Added transposition /-, REVERB (ON / OFF), speed, curve (NORM / HEAVY / SOFT / VEL), Arpeggio mode (ARP mode), Arp TIME, and keyboard scale (SCALE) buttons sustain pedal input port / 3.5 mm Headphone jack/ USB interface. Support system and Windows XP/7/8/10/11