Simple Description: Sleep Mask, USB Rechargeable Sleep Mask, Hot, 99.99% Light Blocking, 3D Ergonomic Design, Japanese Voice Guidance, Eye Warmer, Light Blocking, Cordless, Washable, 3-Level Heat, 8-Level Vibration, Gift, Black Detailed Description: 【99.99% Light Blocking Rechargeable Sleep Mask】Certified by the Japan Textile Products Quality and Technology Center (QTEC) for 99.99% light blocking (※Individual fit may vary). USB rechargeable, suitable for use in various environments such as office naps, travel, and bedtime. 【3D Ergonomic Design Gently Envelops】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 Combination】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 for 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 Sleep Mask】With an adjuster, it fits perfectly for each individual. Because it doesn't require a specific size, it's also a great gift for loved ones. Delivers a relaxing moment for a little daily rest.