The Aquatic Air Therapy™ (AAT) Jets in conjunction with the massage ring provides a massage therapy experience for sore muscles or aching joints (Available only in select areas of spa). FLEX JET™ The Flex Jet™ delivers a gentle but strong stream of water to more delicate areas of the body including wrists, joints and extra sensitive muscles. Experience immediate alleviation from the massage ring included on the Flex Jet™. DUO JET™ The Duo Jet™ is perfect for larger parts of your body including lower back, legs and shoulders. Place your back on the the Duo Jet™ for a complete rehabilitating massage therapy experience. PRECISION JET™ The Precision Jet™ emits the perfect combination of air and water to target specific problematic areas while a soft massage ring provides relief on contact. Relieve muscle tension and soreness with the Precision Jet™. AAT AIR CONTROL The Aquatic Air Therapy™ has its own dedicated Air Control that allows you to adjust the air flow precisely to create your total spa therapy experience. For more information about Cal Spas, please visit www.CalSpas.com