Powerful Sound Performance 40mm drivers deliver deep bass, clear mids, and crisp highs. Wide Frequency Range 20Hz to 20,000Hz for full-spectrum audio clarity. Hi-Res Audio Support Enjoy studio-quality music playback with detailed sound reproduction. Long Battery Life Up to 50 hours of playtime on a quick 2-hour charge. Dynamic Stereo Experience Immersive stereo sound with balanced and vibrant tones.