The Pocket Operator Modular 170 is a build-it-yourself monophonic analog synthesizer kit from Teenage Engineering that combines creative construction with hands-on sound design. It comes as a flat-pack system with all the parts you need, including a keyboard with a programmable sequencer, oscillator, filter, envelope, LFO, VCA, on-board speaker, and power distribution, so you can assemble it yourself without soldering. Once built, the 170 delivers classic analog synthesis with a sequencer that lets you create and manipulate musical patterns intuitively. Powered by an internal battery pack (AC adapter optional), it’s portable and playable anywhere, making electronic music exploration accessible. The keyboard interface provides a tactile way to interact with sounds, while the included patch cables unlock modular flexibility for routing and experimentation. With modules like the oscillator and filter, you can sculpt a wide range of tones—from deep bass to cutting leads—and use the LFO to add movement to your patches. The onboard speaker lets you hear your creations instantly without external gear, giving immediate feedback as you play and tweak. Its DIY nature encourages learning the fundamentals of synthesis in a fun, hands-on way while offering enough creative depth to keep you experimenting. The rugged yet lightweight design makes it a standout addition for modular enthusiasts or anyone curious about analog sound design. Whether building your first synthesizer or adding to a larger system, the Pocket Operator Modular 170 brings playful creativity and sonic exploration together.