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