Sweatproof Wireless Bluetooth Headphone v4.1 wireless sport in-ear Earphone Noise Cancelling Earbuds for Running Sports;

Style:In-Ear
Communication:Wireless
Bluetooth Version:V4.1
Connectors:3.5mm
Use:Mobile Phone
Function:Bluetooth, Microphone
Package:Retail Package
Charging Time:2H
Working Time:6-8 H
Standby Time:10 Days
Distortion:≤5%
Built-in li-ion Battery:80mAh
Frequency Range:20-20KHz
Sensitivity:102-105DB
Speaker size:10mm
Packaging Details:140*110*50mm
Advantages:
 1.Bluetooth Version:V4.1
 2.Photo taking function. 
 2.Advantaged price and high quality for mass purchase.
 3.Beautiful package for your require for the earphone.
 4.In-ear design making noise cancelling.
 5.Enjoy the natural melody .
 6.Many designs can be chosen.
 7.Never hurt ears.
 8.Sells to all over the world .