1)Changeable massage attachments for direct massage of the sole of the foot; 2)Over 100 massage burls for simulating the foot reflex zones; 3)Air bubbles can intenerate& massage the feet skin mildly; 4)Double-walled housing; 5)Body-building in magnetic force; 6)Bath salt without bubbles or essence for more comfort; 7)The temperature of water is available 25℃~45℃; 8)River circulation; 9)Cable storage; 10)Ozone bactericidin