Headphones preservation :
> Headphone cable storage volume as much as possible by hand, do not use any headphone winder.
> Headphones should be placed headphone storage box (sacks, bags) to saved.
> Headphones saved environment should be dry
> Headset accessories headset box should be put together with headset , and keep the headphones and accessories clean and sanitary

Specification:
Twins,true wireless stereo(TWS)
Chipset: CSR from UK
Bluetooth Version: 4.2
Frequency: 2.4GHz
Wireless range: one for above 20m, and a set for above 10m
Receive sensitivity: -90dBm
Battery capacity: 65mAh for left and right one
NOKIA charging port
Work time: one for 5-6 hours, and a set for 2-3 hours
Stand-by time: one for 120 hours, and a set for 60 hours
Charging time: 1 hours
Support one match two, connect two device
Voice prompt for calling number
Voice prompt for power and or off
Supports A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/DI1.3
Adopt the advanced CVC6.0 active noise-cancellation
Built-in superior HD microphone, provide clear and loud sound
Selectable colors: black,white,blue and pink