This ultra-light firm Sports Bluetooth Earphones is a piece of great audio equipment for athletes and anyone on the move. The earphones have an active noise cancellation system that helps with focussed attention on your work without disturbance. The mic which is positioned near the mouth is a great idea to help the listener understand your voice without straining. 

Features:

• Active noise cancellation system activated
• Driver unit:13mm*2
• Frequency Response Range:20-20000Hz
• Sensitivity:116dB
• Communication:Wireless
• Standby Time:About 250 hours
• Line Length:0.8m