3-in-1 infant bath tub, digital scale and water thermometer. With just the touch of a button you will know the exact weight of baby - accurate to the ounce - and water temperature. Aqua Scale has a removable insert to keep babies up to 6 months securely positioned in the tub. After 6 months, remove the insert and Aqua Scale converts to a toddler tub accommodating baby up to 2 years (44 pounds).