1.Bluetooth 4.1 stereo in-ear headphone, provides outstanding sound performance.
2.Soft silicone ear-buds, comfortable and anti-falling when do sports.
3.Hidden functional keys (power on/off, answer/end call, volumn up/down).
4.IPX4 waterproof design, prevent corrosion from sweat or rain.
5.CVC6.0 smart noise cancelling technology, produce clear sound.
6.High capacity lithium battery, allow up to 6 hours of continious working time.
7.S/M/L sizes earbuds included.