Improve blood circulation: 6 modes, 10 intensity levels, 15 minutes automatic cycle mode, variable double wave frequency, stimulates the muscles of the feet and calves with low frequency pulsion technology to promote blood circulation and relax feet.This product does not contain batteries, you can buy 2 AAA batteries The new technology: with technology, this foot massager releases tired foot and calf muscles and improves blood circulation. Unlike conventional foot massagers, the foot massager is very mild to improve blood circulation, release tired feet and calf muscles, and is suitable for all skin types. Effective Fatigue: This bioelectric foot massager sends signals directly to the leg muscles by electric muscle stimulation to relieve foot fatigue. Effectively relieves fatigue, improves sleep and relieves stiffness and muscle pain.This product does not contain batteries, you can buy AAA batteries. Easy to carry and clean - An ultra-slim, lightweight and portable design in good size offers you a comfortable experience. When you step on the mat, you will feel that your feet are doing yoga. Quiet without noise, can be used when watching TV, reading, working in the office or relaxing. Widely used: Best Mother's Day gift, the foot massager was developed for sports enthusiasts, the elderly, office workers and women who sit / stand for a long time and often wear high heels. (Note: first place your bare feet on the mat, you cannot leave the mat during use)