Enco Air 24 Hours Total Battery Life 10-Minute Charging for 8 Hours Playback Semi-Translucent Design 12 mm Crystal Clear Vocal Driver Earphone -Model: ET161Charging case model: ET162 Audio quality Driver: 12 mm dynamic driverDriver sensitivity: 112±1 dB at 1 kHzFrequency response range: 20 Hz - 20 kHzMicrophone sensitivity: -38 dBV/Pa Bluetooth Bluetooth version: 5.2Bluetooth range: 10 m