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