Yesido MG11 3 Modes Adjustable Width Neck and Shoulder Massager(White)Features: 1. Refreshing and decompressing, neck massage: simulate kneading and acupressure massage, effectively relieve neck and shoulder muscle tension and soreness. 2. Constant temperature hot compress, relax tight muscles: built in heating device, warm current constant temperature (41 45 degrees Celsius) hot compress, promote blood circulation in the neck, relieve muscle tension, and relieve pressure comfortably. 3. Lightweight and not tiring to