Designed to warm IV fluid up to 100ºF (37.8ºC) at a flow rate up to 6 ml per minute in room temperature between 68 77ºF (20 25ºC). Simply slide the standard IV line into the groove on the heating plate, and then close the unit cover. With attached a hanger, the FW-1 can easily be hung on a cage door, IV pole, or surgical table.