The Pocket Operator 20-Series Super Set from Teenage Engineering includes the PO-20 Arcade Synthesizer, the PO-24 Office Synthesizer, and the PO-28 Robot Synthesizer, along with three matching cases, three sync cables, and three pattern cards.

PO-20 Pocket Operator Arcade Synthesizer Small enough to fit in your pocket and powered by a pair of AAA batteries, the Teenage Engineering PO-20 Pocket Operator Arcade Synthesizer features 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.

PO-24 Pocket Operator Office Synthesizer Small enough to fit in your pocket and powered by a pair of AAA batteries, the Teenage Engineering PO-24 Pocket Operator Office Synthesizer features the sounds of office equipment with 16 punch-in effects including aliasing, overdrive, repeat, filters, distortion, glitches, and noise. 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.

PO-28 Pocket Operator Robot Synthesizer Small enough to fit in your pocket and powered by a pair of AAA batteries, the Teenage Engineering PO-28 Pocket Operator Robot Synthesizer features synthesized sounds and waveforms as well as a micro drum kit with 16 punch-in effects including distortion, repeat, filters, fill-ins, glitches, and noise effects. 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.