Bubble jet massage system (110 jet holes). No tools required for set up. Inflates in minutes using pump supplied. Heating efficiency of 1.5-2.5°C per hour up to a maximum of 40°C (104°F). Digital LED control panel. Power saving temperature sensor automatically heats water back up to set temperature if the water temperature drops by 2°C. Supplied with protective ground sheet top cover with safety clips filter cartridge (x2) inflation hose drain hose 15cm connection hoses (x3).Dellonda 2-4 Person Inflatable Hot Tub Spa with Smart Pump - Rattan Effect• 2-4 Person hot tub spa.• Bubble jet massage system (110 jet holes).• No tools required for set up. Inflates in minutes using pump supplied.• Heating efficiency of 1.5-2.5°C per hour up to a maximum of 40°C (104°F).• Digital LED control panel.• Power saving temperature sensor automatically heats water back up to set temperature if the water temperature drops by 2°C.• Outer Dimensions (Ø x H): Ø175 x 70cm• Inner Dimensions (Ø x H): Ø135 x 70cm• Cable Length: 5.3mSupplied with protective ground sheet top cover with safety clips filter cartridge (x2) inflation hose drain hose 15cm connection hoses (x3).• Model No. DL90Model No: DL90:Brand: Dellonda:Nett Weight: 24.7kg:Water Capacity: 800L (211 gal):Inner Dimensions: Ø135 x70cm:Outer Dimensions: Ø175 x 70cm:Capacity: 2 - 4 People:Bubble Jet Holes: 110:Massage Bubble Power: 650W:Heating Rate: 1.5 - 2.5DegC/hr:Maximum Water Temperature: 40DegC (104DegF):PTDSEADL90