Sleep with music, not earbuds. This Bluetooth 5.0 eye mask pairs with your phone to play music, podcasts, or white noise while blocking light. 3D contoured design provides a comfortable fit with effective light blocking. Ultra-soft, breathable fabric for extended wear. Adjustable strap fits all head sizes.Specifications:• Dimensions: 30 × 15 × 3cm• Bluetooth Version: 5.0• Battery: Built-in lithium (USB rechargeable)• Colors: Black, Pink, Dark Blue, Dark Gray• Design: 3D contoured, adjustable strap• Material: Soft breathable fabricWhat's Included:• Bluetooth sleep eye mask ×1• USB charging cable ×1Each description above is based strictly on the supplier's original product specs. No features have been invented or exaggerated.