The Upgraded Foot Massager has 6 knee pads and 18 rotating massage nodes for in-depth knee exercises, targeting the most important pressure points of your feet, improving blood circulation, minimizing pain, and relaxing tired feet and muscles. Get the best foot pain and relaxation experience. It can also help people with cold feet, chronic pain, and fatigued muscles, especially if you transfer infrared heat to maximize health and relaxation. Other special features are infrared heat therapy/function (can be turned on or off)and a height-adjustable machine (2 levels of height). Gun Massager is a handheld device that applies pulses of concentrated pressure deep into your muscle tissue. This form of deep-tissue massage can work knots and tension out of the muscles while improving blood flow and quickly enhancing range of motion. When used properly, a percussion massager can shorten your recovery time while relieving some of the pain, tension, and soreness that comes naturally from intense martial arts workouts.