The Pocket-Synthesizer from the Swedish cult manufacturer Teenage Engineering does not feature a housing and so you can see all of the components and the circuit board as part of the design.
The Pocket Operators are powered by two standard AAA batteries.
Additionally, each pocket operator is equipped with an animated LCD display, an integrated speaker, bent wire stands, Jam Sync for connecting multiple devices, Line In and Outputs (3.5mm jack) and even a practical alarm clock.
Step automations can be recorded with Parameter Lock.
Some of the available effects: Filter, Bit-Crusher, Delay and Stutter