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Headphone
Bluetooth Series
KOGI-K20
Bluetooth Version: V4.2
Driver Unit:Φ40mm 
Impedance: 32Ω 
Sensitivity: 105 ±3dB 
Frequency Response20Hz-20kHz
Receiver Distance: Up to 10 meters 
Working Time: Up to 5 hours
ChargingUSB 2.0
Support: TF/Micro-SD card
Battery:Rechargeble Lithium-battery(3.7V/300mAh)
Features:Bluetooth, Calling, AUX, Sensitivity Microphone,Volume Control, etc.

Clours:Black, White