Product type: Comfortable head strap (Elite Strap) with built-in battery for VR glasses. Battery capacity: 10,000 mAh (10000mAh). Additional playtime: Gives you 2 to 4 hours of additional uninterrupted playtime. Weight distribution (balance): The rear battery acts as a counterweight, relieving pressure on the face and nose and making the glasses feel lighter during gameplay. Size adjustment: Equipped with a circular rear dial for easy tightening and loosening of the strap to fit different head sizes. Comfort and padding: Soft foam cushions on the top and back for better head stability and easy cleaning. Charging method: Type-C port supports direct charging while in use. Condition: Brand new in box (unused). Sale: Urgent, need the money