for 2 does not come with a battery: A 10,000mAh battery is required, which can extend battery life by 8 hours, ensuring your VR adventure is not interrupted due to low battery.(Note: without batteries) Adjustable ergonomic design: Features a 360° rotating adjustment knob for easy adjustment. The ergonomic design reduces pressure on the face and head, ensuring comfort during extended use. and material: Crafted from eco-friendly polymer material, the headband can withstand 10,000 bends, and the design makes it easy to carry. Universal fit for all head sizes: Features an adjustable top headband, this premium headband is suitable for both adults and children, making it the ideal accessory for all VR players. Easy to install and portable: Features a one-button clasp, making headband installation and removal simple, perfect for VR experiences anytime, anywhere. Color: White Material: ABS Package Contents: 1set x helmets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.