Bluetooth Earphone Wireless Headphone Hi-Fi Sound Active Noise Cancelling Deep Bass ANC Earbuds with Mic

Features:
Professional Active Noise Cancelling Technology. 
Proprietary 40mm Large-aperture Drivers. 
High-quality Built-in Microphone and NFC Technology.  
The Professional Protein Earpad and 90° Swiveling Earcups.  
A built-in 600mAh battery won't allow your headphones power off, you can enjoy your world without noise for 30 hours' long time. 
  
Specification:
Standard Version: Without ANC Function. 
Upgrade Version: With ANC Function. 
Impedance:16Ω. 
S/N: ≥85dB. 
Frequency: 20Hz-20kHz. 
Noise Reduction Depth:28db. 
Bluetooth: V 4.0＆NFC. 
Sound:40mm large-aperture drivers. 
Playtime:30 Hours. 
Power supply: Lithium battery or Micro USB cable. 
Item Weight:13.6 ounces. 
  
Package Included:
1 * Headphone. 
1 * Charging Cable. 

1 * Manual