Pocket-sized synthesizer received from a friend. Teenage Engineering's Pocket Operator series. Body only. Simple operation has been confirmed. Sound output is working. Free shipping via Rakuraku Mercari. I cleaned it as much as possible, but there may still be some remaining dirt. Please refrain from purchasing if you are concerned. As time has passed since the purchase, there may be some crackling when turning the knobs or moving the jacks. Also, as this is a used item, please understand that it is non-refundable and non-returnable. No complaints, no returns. The following is an excerpt from the product page: -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- https://www.minet.jp/brand/teenageengineering/po16/ A synthesizer specialized for melodies/leads, equipped with 15 types of sounds + 1 drum machine. Experience a new way to create music with just your thumb. Pocket-sized, game-like graphics, a full-fledged synthesizer engine, sync, punch-in effects, built-in speaker, alarm clock, and very affordable. Making music creation more fun than ever. Pocket-sized, game-like graphics, and a full-fledged synthesizer engine. Sync with other PO series, punch-in effects are also possible. Built-in speaker, alarm clock, and very affordable. The Pocket Operator is an ultra-compact synthesizer that allows you to enjoy a variety of functions even in a compact size by exquisitely arranging components on a single board. Important and sensitive parts are placed under the LCD display, allowing it to be used without a case. By saving on the cost of a case, high-quality parts are used, achieving high sound quality and low power consumption. The space behind the display also serves as the speaker's enclosure.