Bluetooth version :V5.3
Bluetooth profiles: HSP、HFP、A2DP and AVRCP
Noise reduction: 25dB
Battery: Lithium battery 250mAh
Driver unit: 40mm neodymium
Sensitivity: 95dB±3dB
Frequency: 20-20KHz
Impedance: 32Ω
Working time : 10 hours
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