Easy to relax muscles: Usually we need to relax the muscles after exercise or long-time working, this massage gun helps for relieves tight muscles, soreness, and stiff backs. 6 Speed levels: This massage gun deep tissue has a total of 6 speeds (1-2 wake muscles, 3 relieve soreness, 4 deep tissue massage, 5 muscle recovery, 6 suitable for use after high-intensity exercise). Interchangeable massage heads: Ball head can be used for arms, lower back, hips, thighs and calves; bullet head can be used for meridians, joints, palms, soles of feet; flat head can be used for relaxation and shaping of all muscle groups; u-shaped is available on the shoulders, spine and bilateral muscles.