Enjoy great relaxation with our blowup hot tub for 2-4 people, designed with 110 air jets for a 360° massage experience. The energy-efficient setup includes a 20-minute auto shut-off for conservation. The PTC heating system offers 1350W high power and 68-104℉ temperature range, but note that heating function is separate from the bubble mode. The hottub's optimal filtration system tackles dirt and debris, and with a prompt for maintenance every 168 hours, it keeps the water pristine. As the brain of inflatable hot tub, the heater pump, complete with an LED display and touch panel, offers more safety designs, including GFCI plug, child lock and FP mode. Made of premium materials for outdoor use, the 3-layered PVC walls are built to last. It has an insulated PVC cover and a PE ground sheet for added protection. More premium details await your discovery. Precautions: Please avoid use when ambient or water temperatures dip to 39℉ or below.