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;
