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产品名称：Bluetooth Headphone B9
Features:
Memory-connect
Multi-function remote control with microphone
Durable Metal Headband
3.5mm Direct Line-in
22 hours listening duration
Memory-connect
Multi-function remote control with microphone
Durable Metal Headband
3.5mm Direct Line-in
22 hours listening duration
Specifications:
Bluetooth Version: V4.2
Frequency Range: 20Hz~20KHz
Distortion: 0.5%
S/N Ratio: 80dB
Sensitivity: 90±3dB
Impedance: 32Ω
Battery: 3.7V/500mA
Driver Unit: Φ40mm
Charge Time: 3 Hours
Working Time: 22 Hours
Working Range: 10 Meters