battery 50mAh wireless earphones bluetooth KADUN X2 china products manufacturers-tws earphone music time 3 hour

Specs Bluetooth Version:V5.0  
Battery:Earphone50mAh+Charging box 250mAh
  Charging Time:1 Hours 12 Minute
  Music Time:3 Hours 16 Minute
  Drive Unit:10mm  
  Transmission Distance:10m  
  Solution:JL Chipset(Jieli)