Maximizing your personal audio experience has never been easier than with SONY ZX-Series Monitor headphones. Built with comfort and performance in mind, there’s no need to compromise. 30 mm driver units deliver full, balanced sound for a complete listening experience from 12 - 22,000 Hz. Compact for portability yet affording listening flexibility, the swivel, folding earpads let you enjoy music in many ways. Keep your music playing all day with a battery life that delivers up to 50 hours of power. USB Type-C quick charging gives up to 90 mins of play back from 3 minutes of charge. Now you’ll have enough power for multi-day road trips and long festival weekends.