Heating efficiency of 1.5-2.5? C per hour up to a maximum of 40? Power saving temperature sensor automatically heats water back up to set temperature if the water temperature drops by 2? Supplied with protective ground sheet, top cover with safety clips, filter cartridge (x2), inflation hose, drain hose, 15cm connection hoses (x3). ACESSORIES INCLUDED - 2x Cushions, 2x Headrests, 1x Dual Cup Holder & Tub Cover Alias ID - ys12325.