QCY Crossky C30 Feature : 
Open style, Waterdrop design
NCVM, Nitinol C-shaped bridge, Skin-friendly silicone material
Inverted Z style for stability, Even distribution of all stress points
High sensitivity dual magnetic driver offering powerful sound that penetrates soul
Dynamic bass adjustment algorithm making sound smooth
Directional audio for a perfect angle where acoustic beam enters ear
360 spacial sound
Dual-mic ENC and wind noise canceling for clear call 5.5-hour playback after one top-up 25 hours of total battery life(with the case);
10-min charge offering 1-hour playback
Multi-point connection