The MEDCURSOR Cordless Knee Massager ST-1101A is a white and black massager designed for the knee with heated and vibrating massage functions. It has a sleek and compact design with a single massage head, powered by a 3.7V battery and USB charging capability. With an endurance time of 30 minutes, this knee massager from the trusted brand MEDCURSOR offers a cordless feature for convenience and ease of use. The plastic material ensures durability, while the FCC, CE, and RoHS certifications ensure quality and safety. Perfect for relaxing and relieving tension in the knee area, this massager is a great addition to any fitness routine or wellness regimen.