• 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 ohm • Sensitivity: +/-3dB • Distortion: