PO-12 / rhythm the rhythm is a drum machine with a 16 step sequencer with 16 different sounds which are a mix between synthesis and samples. PO-14 / sub the sub is a bass line driven synthesizer. it’s got a 16 step sequencer with 16 sounds and 16 effects/playing styles. PO-16 / factory the factory is a melody / lead-synth oriented machine with a 16 step sequencer, 16 sounds and 16 effects/ playing styles. "Teenage engineering’s new line of musical instruments is called pocket operators and consists of three pocket sized synthesizers. all three models come without casing where the components and artwork are visible directly on the printed circuit board. the 2xaaa battery powered pocket operators also come with a segment lcd screen, built in speaker, alarm clock and a stand made from bent wire. all models also feature parameter locks as well as synchronization functionality and they all have 3.5mm line in and line out. each model has its own set of effects such as filters, bit-crushing, delay, stutter and many more. 59$ each"