Battery: built-in 400mAh accumulator Connection: Bluetooth 5.0 with EDR Range: up to 10 meters Microphones: yes MicroSD memory card: Yes Frequency: 50 Hz to 20 kHz Impedance: 16 Ω Standby time: up to 14 hours Charging time: about 1-2 hours Working time: up to 6 hours
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