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Headphone
Bluetooth Series
KOGI-K15
Bluetooth Version: V4.2
Driver Unit:Φ40mm 
Impedance: 32Ω 
Sensitivity: 105 ±3dB 
Frequency Response: 20-20 KHz 
Receiver Distance: Up to 10 meters 
Working Time: Up to 6 hours
Support: TF/Micro-SD card
Battery:Rechargeble Lithium-battery(3.7V/300mAh)
ChargingUSB2.0

Clours:Black, Blue, White,  Red