Fully tested, in excellent all round condition. Comes with deck saver, original USB power cable, blue crank colour knob, antenna and teenage engineering rubber bands. 

The Teenage Engineering OP-1 is an all-in-one portable synthesizer, sampler, and controller. It boasts a range of innovative features, including:

• USB Audio: Connect to your computer and record or stream high-quality audio.
• Built-in FM Radio: Tune into local radio stations and use the OP-1 as a unique sound source.
• Assignable G-Force Sensor: Use motion-controlled effects to add dynamic expression to your sounds.
• Velocity-Sensitive Keyboard: Play and perform with a responsive and expressive keyboard.