1. Material: EVA 2. USB timing temperature control: 15 minutes/30 minutes/60 minutes 3. USB three-speed temperature adjustment 4. Curved stretching design, acupressure points massage the cervical spine 5. The radian support fits the cervical spine and stretches comfortably 6. Elastic material, comfortable and skin-friendly 7. USB connection conducts heat, heats up faster, and is easy to use 8. Weight: 272 grams
