Rechargeable Bluetooth 4.1 Wireless Headset, 3D Stereo Surround Sport Headphones, Noise Cancelling Waterproof Earphones 

Feature:
Powerful bass resonance, 3D stereo surround, excellent noise reduction and sound cancellation function, to ensure high-quality sound quality for you.
The battery life is extremely strong, with 40 hours of music use time, 45 hours of talk time and 1625 hours (about 67 days) of standby time.
Comfortable to wear, soft earmuffs and artificial protein skin earmuffs that mimic the texture of human skin ensure long-lasting comfort.
You can connect two Bluetooth devices at the same time, seamlessly connect mobile phones and tablets, or connect another headset to share music with your friends.

Friendly Tips:
1.Please kindly allow 2-3% difference according to manual measurement.
2.Please check the measurement chart before you buy the item. (1inch=2.54cm)
3.Please note that slight difference should be acceptable due to the light and screen.Thanks.

Specification:
Drivers: 57mm speaker X 2
Transducer type: Dynamic
Bluetooth version: V4.1
Frequency range: 2.4GHz-2.48GHz
Operating distance: Up to 10m (free space)
Bluetooth profiles: A2DP AVRCP HSP HFP
Impedance: 16
Frequency response: 20Hz-20kHz
Sensitivity: 110dB
Distortion: <0.1%(THD) 
Talk time: Up to 45 hours
Standby time: Up to 1625 hours
Charging time: About 2 hours

Package Contents:
1* Original Earphone
1* USB Cable
1* Aux Cable

Promise:
If the product has any quality problems, please feel free to contact us, we will help you solve the problem as quickly as possible.