Neckband bluetooth headset KADUN KD201BT wireless earphones 130mAh hedphone wireless with SD memory card slot

Specs Bluetooth Version:V5.0
  Battery:130 mAh  
  Charging Time:3 Hours
  Music Time:7 Hours
  Drive Unit:10mm  
  Transmission Distance:10m
  Solution:JL Chipset(Jieli)
  TF/SD/Memory Card Slot