Open Box. The mattress topper is sealed and unopened. The box has damage, but everything is new and not used. From Homeate: Comfortable sleep: Our heated mattress pad provide you with a warm and comfortable sleep, no longer have to be afraid of the cold in winter. The three-layer fabric can effectively resist static accumulation and electromagnetic radiation, allowing you to enjoy a perfect evening. At the same time, the heated mattress pad supports accelerated heating, so you hardly have to wait too long to lie comfortably under the covers. Soft fabric: Our electric mattress pad adopts soft coral fleece fabric, three layers of fabric and a more reasonable heating wire layout, which can evenly distribute heat and avoid local overheating; Maximum safety: PTC/NTC heating wire is adopted, which has passed the UL964 safety standard, and the rated voltage is 110V. The heating mattress can promote blood circulation, relieve muscle soreness, let you completely relax after a hard day, and warm your cold hands and feet. Intelligent controller: 10 hours automatic power off, don't worry about forgetting to turn off the power, make you more assured; single controller, 5 temperature gears, very simple operating system, you can freely adjust your own optimal temperature.