Tips: To prevent burns, please read our instructions carefully before use. Since some customers have sensitive neck skin, please use it from the lowest level temperature for the first use. If you feel any discomfort during use, please stop using it immediately. Warranty & Support: We offer all customers a 5-year warranty, 365-day free replacement, 90-day free return, and 24-hour professional customer service after your purchase. Please feel free to contact us if you have any issues, we will gladly resolve to make sure you are 100% satisfied with your purchase. USB Powered & Portable: The neck hot pad is powered by USB, and can simply plug into any PC, power bank, USB adapter, or car charger. Lightweight and portable, it can be used in the office, at home, as well as while traveling. Anywhere you are, it can relieve fatigue, muscle stiffness, and neck soreness. NOTE: It needs to be plugged in to work. Cold Compress: The heating pad features a mesh neck pocket, where a gel hot/cold compress can be inserted. Simply freeze the gel for cold therapy. A perfect companion to the heat for muscle aches and reducing inflammation in the neck. The gel can also be microwaved to use as a heated compress without power (Note: the gel is not included in the package). 3 Heat Settings & 1.5H Auto-off: The 3-level heating settings features provide comfortable temperatures to our customers. Plus the 1.5H auto-off and overheats protection to keep safety. Targeted Heat Therapy: The neck heating wrap can provide comfortable heat therapy in just a few minutes, stimulating blood circulation, while soothing stiffness and soreness. To make sure feel the heat better, you can adjust the magic tape slightly to fit your neck more closely.