Shape sound with the world around you. Master your instrument, master Hikari ! The newest iteration in personal pocket synthesis! Two knobs to control volume & pitch, as well as a photocell to sense light (plays like a theremin) and a momentary button to engage. Each Hikari 2.0 is handmade in Philadelphia, PA - runs off a 9v battery with a built in 8ohm speaker. Also has a headphone jack for wandering about & line out recording.