1. Knee Massager: A knee massager is a device specifically designed to soothe, relax and relieve discomfort in the knee area. It is usually driven by an electric motor and provides massage and physiotherapy effects on the target area through various massage techniques such as vibration, hot compress or air pressure massage. 2. Leg beauty instrument: The leg beauty instrument is a device specially designed to provide beauty care for the legs. It usually uses a variety of technologies, such as infrared heat therapy, high-frequency vibration, light irradiation, etc., which can improve the skin texture of the legs, promote blood circulation, reduce the accumulation of cellulite or fat, and help tighten and shape the contours of the legs. 3. Electric air wave leg massager: The electric air wave leg massager uses air pressure technology to provide soothing massage to the legs through reasonable air flow massage fluctuations. It can promote blood circulation, relieve fatigue, reduce muscle soreness, stretch the leg muscles, and improve the flexibility and health of the legs. 4. Leg massager: A leg massager is a device designed to provide massage for the legs. It uses vibration, kneading, tapping and other massage methods to relax and activate muscles in various parts of the legs, improve blood circulation, relieve muscle fatigue and stiffness, and help relieve leg discomfort and pain 5. Effects and usage suggestions: Each of these devices has its own characteristics. When using them, you need to choose the appropriate device according to your personal needs and health status. They can all provide soothing, relaxing and improving effects on the legs, but it is recommended to read the product instructions before use, use them correctly according to the instructions, and follow the principle of appropriate amount and moderation to avoid adverse reactions caused by over-massage or improper use. If you have special circumstances or questions, it is recommended to seek professional advice