Product Description Product name: knee joint massager Color: as picture Size: 21*15*17cm/8.26*5.9*6.69inch Battery: 3000mAh Input current: 5V--2A Rated voltage: 10W Product Description. Features HIGH QUALITY MATERIALS:The massager is made of high quality materials, including soft and comfortable pads and adjustable straps, the pads are close to the knees to ensure safety. HIGH FREQUENCY VIBRATION MASSAGE: Multi-functional knee massager, vibration massage + thermostatic heat + infrared physical therapy, all-round care for your knee health. The force is comfortable and hits the knee pain directly, gradually relaxing the stiff muscles. EASY TO CARRY: Knee massager is a portable massager that is a simple, stress-free way to easily control knee pain. Experience a professional knee massage anytime, anywhere with the user-friendly design and control. The knee pain reliever uses a combination of vibration and heat therapy to relieve pain, increase blood flow and improve mobility. ADJUSTABLE TEMPERATURE: Rapid heating, 3-speed adjustable temperature (40°C-42°C-45°C), penetrates deep into the knee joint, relieves muscle stiffness and fatigue, warms the knee joint. Eliminate knee joint fluid, effectively relieve knee discomfort, say goodbye to knee pain, remove cold and dampness from the knee joint, improve old cold legs. LARGE SCREEN: LED touch screen, visual touch operation, clear function, simple operation, the elderly can also be used easily. Product Packaging. 1* Knee joint massager