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