Pocket operators come in six models, each of which has a distinctive set of sounds that can be used individually or chained together to create amazing electronic music. Creative and improvisational in nature, you build your composition by looping and layering synthesized sounds and modulating them with built in effects. YouTube has some great examples of how this works in practice. If it all looks a bit complicated, don't worry, it's relatively easy once you've had some time to play around with it.

Here's a run down of the six models available:

• PO-12 Rhythm: 16 sound drum machine perfect for making beats
• PO-14 Sub: Low notes for electro bass lines
• PO-16 Factory: Lead synthesizer with melodic sounds
• PO-20 Arcade: Retro 8-bit arcade style beeps and bloops
• PO-24 Office: Lo-fi computer noise rhythm machine
• PO-14 Robot: Live synthesizer for 8-bit chiptune melodies

All work well independently, but if you have the budget to get two or more they all pair really well with the Rhythm drum machine. If you have to choose one then the Arcade model is popular and boasts a wide range of sounds if you're into the chiptune 8-bit style.