• Built-in microphone ;• Super lightweight;• Charge and store the earbuds at the same time;• Bluetooth(R) version: 5.0;• Frequency range: 20 Hz to 20 kHz;• Transmitting distance: up to 32 ft.;• Speaker: 14 mm;• Music and talk time: up to 5 hours;• Standby time: up to 120 hours;• Impedance: 32 ohms;• Sensitivity: +/- 3dB;• Distortion: less than 0.5%;• Battery: 3 volts/70 mAh;• Charging case: 350 mAh;• Includes charging cable and power bank;