Adjust Head Strap for 3 Glasses, Rechargeable Headband Balance Weight Headwear Enhances Comfort

T300 power headband is a special headstrap that suitable for 3 glasses, which solves the problem of uncomfortable wearing. Comprehensive directional design, 360°+180° adjust, more comfortable to wear. The foldable design can be adjusted to the appropriate size according to the for head circumference, reducing weight. , with the characteristics of toughness, durability, and drop resistance, strong and not easy to break. Scientific endurances power design, build-in 5200mAh battery, can while playing, makes it long service for time up to 3 hours.