Radiant warming units, Infants are used to provide thermal stability to infants while allowing direct observation. Most of these units can be operated either with the heating elements turning on and off according to the changes in the infant's skin temperature (automated mode) or by setting the heater at a constant power level for a set period of time (manual mode). These units are available in several different configurations, including freestanding and mounted on an integral bassinet to facilitate continuous thermal support for newborns and critically ill infants; they are also used for infants undergoing long treatment in a cool environment.