noise cancelling
Environmental Noise Cancellation (ENC)
battery capacity(mah)
Earpiece: 50mah; Charging Case: 2000mah
battery indicator
Digital Display
wireless delay time
51-60 ms
brand name
YISSIY / Neutral Package
place of origin
Guangdong, China
Product name
M21 Couple TWS
Battery capacity of the headset
50 mAh
Battery capacity of the storage box
2000 mAh
Transmission range frequency range
2.4GHZ-2.4835GHZ
Call / Play time:
4-6 hours
Charging time
about 1 hours
Key Feature1
Real IPX7 Waterproof Earbuds
Key Feature2
Two Pairs Earphones for Couple / Lovers
