Brand: Xiaomi Model: BHR4089GL Material: ABS White color Sound 14.2mm Diaphragm Frequency: 20-20kHz Impedance: 32 ohms Stereo sound Features Media playback control Call control Decreased ambient noise Control touch pad Microphone Included Beamforming technology Bluetooth: 5.0 Bluetooth operating distance: 10 meters Accepts AAC Battery Output current: 5.2V / 1.1A Charging port: USB-C Autonomy: up to 5 hours Autonomy with box: up to 20 hours Charging time: 1.5 hours