Two functions of Ultrasonic bath *Bubble massage 720 injection holes of bubble mat can spray over 50,000 bubbles per second and produce hydraulic eddy current to give your skin and acupuncture points a thorough massage, so as to let you relax as well as promote blood circulation. *Ultrasonic heat penetration, transmission and cleaning The sudden burst of 50,000 bubbles can radiate a great quantity of natural ultrasonic wave with heat energy, which will penetrate into bodys cuticle and warm muscle and bones from inside to outside. The special.ultrasonic heat penetration effect produced by bubbles can activate cells, relax nerves, discharge poisonous substances such as fatigue lactic acid. Besides, the ultrasonic has powerful cleaning ability, so it can thoroughly clean skin without using soap liquid. Technical parameter: Voltage: 110V 60Hz OR 220V 60Hz Power:800W (motor:600W heating:200W) Designed service life: 10 years, under normal use