Image: Teenage Engineering

The synth wizards at Swedish electronics maker Teenage Engineering just introduced perhaps their most perplexing and intriguing product yet: a rewindable radio and speaker system called the OB-4. The device, which is available now in black or red for $599, is as sleek and well-designed as the company’s standard synth products, but it packs a whole lot of interesting tech under the hood.

The core feature of the OB-4 is its manual rewind dial paired with an integrated motor, which the company says will let you rewind back to anything you’ve listened to in the past two hours on a rolling basis — whether it was live radio, a Spotify playlist played via Bluetooth, or even an instrument plugged in, like one of Teenage Engineering’s synths….

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