About this item 65 Hours Playtime: Low power consumption technology applied, these bluetooth headphones with built-in 500mAh battery can continually play more than 65 hours and standby for over 950 hours after one full charge. By using the included 3.5mm audio cable, the wireless over-ear headphones can easily switch to wired mode when powered off. No power shortage problem anymore. Optional 6 Music Modes: Adopting advanced dual 40mm dynamic sound units and 6 EQ modes, these updated wireless bluetooth headphones are designed for audiophiles. Simply switch between balanced sound, extra powerful bass, and mid treble enhancement modes. Whether you prefer rock, jazz, rhythm & blues, or classical music, these headphones are committed to providing excellent sound quality. All Day Comfort: Made with premium materials, these 0.38lb over-ear bluetooth headphones are among the lightest in the market. The adjustable headband makes it easy to fit all head sizes comfortably. Softer and more comfort