TONALITY - AURICULARES WIRELESS BLUETOOTH HEADPHONESFOLDABLE OVER-EAR HEADPHONES - INTEGRATED CONTROLS - AUXILIARY 3.5 MM JACK CABLE (IN THE EVENT OF A FLAT BATTERY OR DEVICE WITHOUT BLUETOOTH TECHNOLOGY) - INTEGRATED UNIVERSAL MICROPHONE - USB / USB-C CHARGING CABLE.POWER SUPPLY: 3.7V - 400 MAH BATTERY - AUTONOMY: UP TO 30 HOURS OF LISTENING - CHARGING TIME: 2 HOURS - CONNECTIVITY: WIRELESS - MAGNET DIAMETER: 40 MM (NEODYMIUM) - FREQUENCY RANGE: 20 - 20,000 HZ - IMPEDANCE: 32 OHM - COUL. NAVY BLUE & STORMY GRAY