The water is filtered and double-heated by the pump, and then pumped into the spa, which ensures rapid heating, stable temperature control, and adequate safety protection. This highly insulated spa is still portable and able to be set up within 20 minutes. Product features: Dual heating system that provides rapid heat up to 104 degrees Fahrenheit. Constant temperature control. Eco-friendly. Equipped with 90 powerful massaging jets. UV protected woven rattan outer shell designed to survive all climates without compromising comfort in the process. Heat insulation foam layer that is 50% thermally efficient and energy saving. 3-ply reinforced laminate Tri-Tech PVC liner makes the spa long-lasting. Anti-bacterial filters keep spa water cleaner by inhibiting bacterial growth. Digitally controlled pump with soft-touch control panel. Simple to use controller allows you to alter the temperature and bubble function from the warmth of the indoors. Quick and easy installation. Insulated child-safe double-locking clips for protective top cover. Includes top cover, floor protector, pump unit, 2 filter cartridges, flexible inflation hose, and repair patch. Specificiations: Recommended capacity: 4-6 person. Volume capacity: 317 gallons. Water depth: 27.5". Outer diameter: 76". Inner diameter: 65". AC 110-120 Volt, 60 Hertz, 1380 Watts. Color: Black.