Small enough to fit in your pocket and powered by a pair of AAA batteries, the Teenage Engineering PO-20 Pocket Operator Arcade Synthesizerfeatures real synthesized arcade, drum, and chip-tune sounds with 16 punch-in effects including solo chords, filters, fill-ins, glitches, and arpeggios. The synthesizer parameters can be locked, while a 16-step sequencer, which holds 16 patterns in memory, can be chained into a song with up to 128 patterns. An integrated clock and alarm clock expand the creative possibilities of the instrument. A jam-sync function with 3.5mm audio in and out connections allows for multiple synthesizer units to be linked together.