All-in-one: heating therapy, oxygen bubbles massage, high-frequency vibration massage.It effectively promotes blood circulation, improves metabolism, relieves fatigue, and smoothens the meridians (Qi system).Uses quality PTC heating semiconductor-- speed heating, maintaining a constant temperature, and secure multi-insulation protection. Safe and secure double overheating protection.Two active massage rollers, which roll the whole foot bones, are set specially in water output. This truly eliminates fatigue.Body made of high-quality plastic -- high temperature resistance and aging resistance. Beautiful and elegant. Good for personal use and as gifts for others. 110V, 60HZ, 380 watts, UL listed.