Teenage Engineering Pocket Operator PO=20

The Teenage Engineering PO-20 Arcade is a tiny, affordable, battery-powered synthesizer and sequencer known for its retro 8-bit, chiptune sounds, featuring a built-in speaker, LCD screen, and functions like chord control, parameter locks, and punch-in effects (bit-crush, delay, stutter), making it great for creating vintage game-style music or adding lo-fi textures to modern tracks. It's part of the Pocket Operator series, designed for portability and syncing with other gear, offering deep, tweakable sound despite its small size. 
Key Features
Sound & Synthesis: Generates classic 8-bit sounds, great for chiptune music.
Sequencer: Programmable 16-step sequencer with pattern memory and live recording.
Chord Control: Built-in chord modes and the ability to chain chords for melodic progressions.
Effects: Includes punch-in effects like bit-crush, delay, and stutter.
Connectivity: Features a line in/out for connecting to other devices, DAWs, or syncing via audio pulse.
Portability: Ultra-compact, pocket-sized, and runs on batteries.
Parameter Locks: Allows for tweaking sound parameters per step for dynamic sequences.