Portable Neck Warmer with Heat Therapy Adjustable Temperature 1. Fast heating, adjustable temperature: long press the switch to start heating. It provides you with instant heat in seconds without having to wait too long. 36-58 degrees Celsius can be adjusted at will. The current temperature will be displayed numerically on the left screen. 2. Neck warmers increase the area where heat is generated. Perfectly wrapped around your neck, it creates heat therapy to boost blood circulation and relieve muscle pain. So it can relieve your neck pain. 3. Ergonomic, three-dimensional curvature, comfortable to wear, light and weight-free 4. Built-in lithium-ion battery, wireless design, more convenient to use 5. The outer layer is wrapped in a highly elastic leather sheath, making it more comfortable to wear and easy to clean. 6. With a portable design, it can free your hands and allow you to do everything at the same time. 7. Suitable for office, camping, hunting, skiing, fishing, shopping, traveling, etc. Parameter: 1. Input voltage: DC 5V 2. Working current: 3.7V 0.91-1.85A 3. Battery capacity: 3000 mAh 4. Working time: 3-6 hours 5. Heating temperature: 36-58 degrees 6. Material: heating cloth + protein leather + hardware + ABS 7. Weight: 175g 8. Dimensions: 182 x 68 x 162mm