Bubble jet massage system (110 jet holes). No tools required for set up. Inflates in minutes using pump supplied. Heating efficiency of 1.5-2.5C per hour up to a maximum of 40C (104F). Digital LED control panel. Power saving temperature sensor automatically heats water back up to set temperature if the water temperature drops by 2C. Supplied with protective ground sheet, top cover with safety clips, filter cartridge (x2), inflation hose, drain hose, 15cm connection hoses (x3). SUITABLE FOR 2-4 people. BUBBLE MASSAGE SYSTEM - Featuring 110 jet holes. EASY SET UP - No tools required. Inflates in minutes using pump supplied. EFFICIENT - Heats 1.5-2.5C per hour up to a maximum of 40C (104F). DIGITAL DISPLAY - LED control panel for easy control. POWER SAVING TEMPERATURE SENSOR -.