[Optimum Heating Zones]Cotton outer, flat design and extended size allow this heated eye mask to stay right on your eyes for a long time to maintain soothing heat to relieve fatigue, dry eyes and tension. .[Temperature & Timer Setting]Featuring 4 heat levels from 95°F to 122°F and 4 timer settings from 10 minutes to 30 minutes auto-off, this warm eye compress allows you to customize your own eye SPA for sleep satisfaction. .[Extended Adjustable Strap]With a larger size and velvet back, the upgraded elastic band and the small plastic buckle on it help to provide a comfortable fit for various face shapes and fix the eye mask in place. Also, with the extended nose cavity, the USB eye mask can block out unwanted light for daytime sleep. You can sleep better by using it before going to sleep. .[USB Powered]Compatible with most 5V/1-2A USB output for universal power supply, this warm eye compress can be powered by laptops, battery packs and car chargers. Please note that the USB adapter is not included in the package. .[Effortless Maintenance]Thanks to the integrated design, this cotton sleeping mask can be washed to remove unwanted buildup after using for a period of time. We recommend that you wash your eye mask regularly for personal hygiene. Take it with you for . If you have any problems with the product, please feel to talk to us. [Make sure it is connected to the power source before use, otherwise it will not heat up.]