Easy for Cleaning: Design a zipper pocket for easy washing, as flaxseed filling bag needs to keep it dry, please take the bag out before washing. Suggest hand washing and do not use till eye mask is completely dry. USB-Powered: Compatible with 5V / 1-2A USB outlets for easy power input, this warm eye compress can be powered by laptops, power banks, and car chargers. You can enjoy therapy anywhere any time during lunch break or before sleep. Please note that USB adapter is not included in the package. Heat adjustable & Auto off Timers: Controller support 3 heat settings to meet the therpay warmth needed and 3 auto off timers (15/30/60 mins) to choose, 4 ft cable length allows you to customize your own eye SPA just in your hands. Easy operation and convenient. Weighted heating eye mask: Unscented, Eye mask is filled with a bag with natural flaxseeds which generate moist when heating for deeper eye relaxing and more effective heat therapy. Relieve Eye Stress & Fatigue: Carbon fiber heating wires generate heat for eyes blood circulation; Heat element touches and heat eyelids, unclog glands directly, deep relieve dry eyes, eye stress & puffiness, Blepharitis, dark circles, relieve eye fatigue, and improve sleep.