Features:

1. Active noise cancellation function .
2. Using high sensitive driver speakers to offer hi-fi sound
3. New battery integrated technology provide durable endurance
4. Applied for smart phones ,pads and players
5. Three sizes of ear-buds to fit your auricle perfectly .

Specification
Audio frequency:  20Hz --20KHz
Active noise canceling:  -36dB
Hybrid type :  feedback and feed forward
Speaker : Ø14.8mm dynamic type
Impedance 16Ω
Battery :  Lithium battery 3.7V 200MAH
Charging type :USB cable
Playing time :18hours
Plug :Plated 3.5mm 4P
Cable length:1.2m