Bluetooth chipset: V4.1
Bluetooth profiles: HSP、HFP、A2DP and AVRCP
Noise reduction: 21dB between 50-500Hz
Battery: Lithium battery 680mAh
Driver unit: 40mm neodymium
Sensitivity: 100dB±3dB
Frequency: 20-20KHz
Impedance: 32Ω
Working time : 30 hours at medium volume
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