SINGLE - AURICULARES WIRELESS BLUETOOTH HEADSETON-EAR HEADPHONES - WIRELESS - BLUETOOTH ALLOWS TOTAL FREEDOM OF MOVEMENT AND WORKS WITH THE BUILT-IN LITHIUM BATTERY - BUILT-IN UNIVERSAL MICROPHONE TO TAKE YOUR CALLS - INCLUDED: USB / MICRO USB CHARGING CABLE.POWER SUPPLY: USB - CHARGING TIME: 1-2 HOURS - AUTONOMY: 8 HOURS (MUSIC MODE) - BATTERY CAPACITY: 3.7V 200 MAH - CONNECTIVITY: BLUETOOTH 5.0 - FREQUENCY RANGE: 20 - 20 000HZ - IMPEDANCE: 32 OHM - POWER INPUT MAX. : 40 MW - SENSITIVITY: 85 DB - MAGNET: 40MM - COL. BLACK