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Headphone
Bluetooth Series
KOGI-B9
Bluetooth Version: V4.2+EDR
Receiver Distance: Up to 10 meters 
Working Time: Up to 6 hours
Support: TF/Micro-SD card
Battery:Rechargeble Lithium-battery(250mAh)
Colour:Red, Blue, Black, White 

Functions:Bluetooth, Calling, Volume control, Switch songs, Answer/Reject a call, Hung up  phone, Redial, Voice prompt, Battery status, FM, MP3