INTEX 28425EH PureSpa Bubble Massage Spa Set Outdoor Inflatable Portable Hot Tub, Includes Energy Efficient Spa Cover, Saltwater System Ready, 4 Person, 77in x 28in

FIBER-TECH BEAM CONSTRUCTION – Innovative Fiber-Tech Technology offers superior structural stability while maintaining a comfortable surface for a luxurious and refreshing spa experience, HARD WATER TREATMENT SYSTEM – Built-in Hard Water Treatment System makes water gentler on skin, clothes and the entire spa system, HEATED AIR BUBBLE TECHNOLOGY – The Positive Temperature Coefficient (PTC) heater is designed to maximize heat transfer to the water, while ensuring the highest level of safety, performance, and longevity, ENERGY EFFICIENT SPA COVER – High density thermal-resistant foam provides extra insulation and minimizes heat loss; this cover enhances the Spa performance while improving the energy efficiency by as much as 50%, SPECS – Designed to fit up to 4 people; outer dimensions: 77" x 28" and inner dimensions: 57" x 28"; water capacity of 210 gallons; water temperature range: 68-104 degrees Fahrenheit, Upgrade the sanitization function with an “electrolytic cell”, item# 28530E (sold separately)