Teenage Engineering PO-24 Office is a pocket-sized synthesizer and sequencer designed for creating music on the go. It has been used by artists such as Flying Lotus, Aphex Twin, and Skrillex. The device is powered by a rechargeable battery and features a built-in speaker, a 16-step sequencer, and a variety of sound effects. It also has a built-in microphone for recording samples and a 3.5mm audio output for connecting to other devices. The PO-24 Office also has a range of knobs and buttons for controlling the sound, as well as a built-in arpeggiator and a range of preset sounds.