Noise reduction and echo cancellation 
Enhanced Audio and Bass Response 

Item: Sport Bluetooth headset
Bluetooth standard:V4.0
Charging means:power adapter output (DC5V 150mAh)
Battery: High-capability rechargeable lithium polymer battery 
Bluetooth Operation: class 2
Talk time:up to 5 hours
Playing time:up to 5 hours
Stand by time:up to 120 hours
Charging Time: About 2-3 hours 

Package Included:
1 x Bluetooth Earphone