The TC Electronic PolyTune 2 is a popular, compact guitar pedal known for its innovative Polyphonic tuning, letting you strum all strings at once to see which ones are out of tune, plus fast Chromatic and ultra-precise  strobe modes (±0.1 cents accuracy) for detailed setup. It features a bright, ambient-light-sensing LED display, true bypass, Drop D/Capo support, and can power other pedals, making it a versatile, pedalboard-friendly tuner for quick checks or detailed intonation.