Features:

-IN-Ear design, Noise reduction for the world's best bass.9D stereo HIFI sound effect.

-Built-in high sensitivity microphone, clearer voice quality.

-Bluetooth 5.0 version
-With the magnetic design, the earphone is just like a necklace around your neck for convenient and secure way for sports.
- 8-10hours playing time.Talk time 12hours.Standby 250hours
-Winding preventing cable design
SPEC:

Bluetooth 5.0V

Signal-to-noise ratio of power amplifier: 90dB

Input voltage: 3.7V rechargeable lithium battery 100mAh 

Play time: 8 hours talk time: 8-10 hours long standby time: 130 hours

Charging input voltage: DC5V 

10MM loudspeakers *2

Frequency response range: 20Hz-20KHz

Sensitivity:  100dB 2dB

Distance: barrier-free 10m