The Flipper Zero spent the past five years becoming the kind of device that people either own and love or have a strong opinion about despite never having touched one. It packaged NFC, sub-GHz radio, infrared, RFID, and a handful of hardware interfaces into a pocket-sized microcontroller toy that became unexpectedly serious in the hands of researchers, hobbyists, and the occasional teenager. It was hugely popular, and the company says that it generated over $150 million in sales with more than a million devices sold.