【99.99% Blackout Rechargeable Sleep Eye Mask】 Certified 99.99% blackout rate by the Japan Textile Products Quality and Technology Center (QTEC) (※Individual fit may vary). Supports USB charging and can be used in various environments such as office naps, travel, and bedtime. 【3D Ergonomic Design for Gentle Comfort】 3D memory foam fits snugly around the eyes, reducing pressure. The elastic strap and head protection design gently support the head, reducing strain even during prolonged use. 【Heat x Vibration, Customizable】 Freely combine three temperature levels and eight vibration modes. In addition to the four basic modes (heat/vibration/heat & vibration/silent sleep), you can create 24 original settings to your liking. Japanese voice guidance supports operation while wearing the eye mask. 【High-Capacity Battery & Auto-Off Function】 Equipped with a 1000mAh high-capacity battery. Usable approximately 15 times on a single charge. Automatically turns off after 15 minutes of inactivity, eliminating the worry of forgetting to turn it off, making it eco-friendly and economical. 【Unisex & Adjustable Eye Mask】 With an adjuster, it fits perfectly to each individual. Because it doesn't require a specific size, it's also a great gift for loved ones. Delivers a moment of peace and relaxation for a little daily rest.