Ordinary : No massage function Single : hot compress Dual : Massage+hot compress Three : Massage+hot compress+traction Features: ELECTRUC MASSAGE PILLOW WITH HEATUnlike most electronic massagers, portable massage pillow has more powerful functions to provide a more efficient kneading-sensations, relieve tense-muscle better ERGONOMIC DESIGN - AWAY FROM PAINS: The neck support pillow that fits the head, and neck; when lying flat, the body presents following the natural curve to keep air-passages for more restful sleep. Comfort: Designed with soft materials for a comfortable and enjoyable massage experience. Versatility: Can be used at home, in the office, or while traveling, providing on-the-go relaxation whenever needed. Targeted Relief: Features adjustables massage modes to target specific areas of tension, providing personalized relief tailored to individual needs. Notice: 1.Actual color may be slightly different from the image due to different and light effect 2.Please allow 1-3cm deviation due to manual measurement Material: chemicals fibre Weight: 350g Size: 41x27.8x3.5cm Method of use: Plugged-in Package List: 1 x Pillow