Why is Bornbright? The ideal temperature for infant formula is 40°C (104°F), which is the closest temperature to breast milk. The default temperature of the Bornbright Bottle Warmer is 40°C (104°F). No matter which function you use, the water will automatically keep desired temperature for 24 hours after the operation is finished. Multi-functions: sterilizer, heater, cooker (L) water boiler and warmer can work at the same time and control them separately to save time. All 4 in 1 multi-functional machine are included the bottle warmer, milk Kettle,sterilizer and weaning food heater. It is very convenient & helpful to complete all these 4 functions by our Bornbright bottle warmer. It always get your milk to the right temperature without any hassle. Built-in temperature sensing probe, control accurately milk temperature. The Bornbright bottle warmer always keep hot water (for warm milk) and the nipple at the appropriate temperature of 40 to 70 degrees. After heating to the set temperature, it will be automatically powered off after 24 hours constant temperature. It is very convenient for night feeding.