Yison B4 Portable Wireless Overhead Foldable Headphone
Brand: Yison
Model No: B4- Black
Product Type: Headphone
Model: B4
Wireless version: V5.0
Drive unit: 10mm
Transmission distance:  ≥10m
Impedance:  32Ω±15%
Sensitivity:  93dB±3dB
Music time:  About 5 hours
Call time:  About 3.5 hours
Battery capacity: 3.7V/110mAh
Charging time: About 1.5hours
Standby time: About 188 hours
Input voltage: Micro USB/ DC5V/ 500mA
Color: Black (As given picture)

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Disclaimer: The actual color of the physical product may slightly vary due to the deviation of lighting sources, photography or your device display settings.