Product selling points:3 heating modes (45C/50C/60C) and 3 choices of vibration intensity to meet the demands of massage intensity under different conditions;Far infrared heating. knee pad thermal technology. The heat released by the far-infrared can quickly penetrate into the subcutaneous tissue and effectively relieve pain. with a long service life. faster heating and more uniform heating;Wireless charging: Built-in 5000MAH rechargeable battery. after fully charged. you can massage your knees while walking. and the battery life can last for one week;Multi-function: The massager is also equipped with a 58CM extension belt. which can massage not only the knees. but also the elbows and shoulders;Easy to use: Long press the button for 3 seconds to start or end work. Fix the machine at the knee/elbow/shoulder position. then press the temperature key to turn on the heating function. and press again to adjust the temperature. Press the vibration button to turn on the vibration function. and press it again to adjust the vibration intensity.Exquisite gift set: HailiCare knee massager is your recommended choice for Valentine's Day. Mother's Day. Father's Day. family. friends. teachers. lovers. etc.