IMMACULATE QUALITY SOUND - 40mm drive units create natural large sound stage from close-back design, similar to Edifier's best selling wired headphones. UP TO 95 HOURS PLAYBACK - Long battery life last up to 95 hours playback or 1500 hour standby after full charge. COMFORT AND CONVENIENT - Lightweight, ergonomic design covered with synthetic leather ensure comfortable wearing all day BLUETOOTH V4.1 WITH EASY NFC PAIRING - Latest Bluetooth technology for high quality streaming. Connect to up to 2 devices at the same time. Quick connect with NFC pairing. WIRED/WIRELESS CONNECTION - Instantly switch between wired and wireless connection with included 3.5mm cable.