ITEM NAME:Baby Bath Safety Care Tool Water Temperature Monitor Water Temperature Card Product Description Description: Specification: Material: plastic Size: 10*9cm / 3.9*3.5in Color: as shown Measuring range: 32-42℃ Usage: Attach the water temperature card to the inner wall of the tub, and read the current temperature through the color change when the water overflows the black temperature sensor. Note that if the water temperature is above 42℃ or below 32℃, the water temperature card will not be displayed. The results are for reference only. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3cm measuring deviation due to manual measurement. Included: 1 X Water Temperature Card.Attach the water temperature card to the inner wall of the tub, and read the current temperature through the color change when the water overflows the black temperature sensor. Note that if the water temperature is above 42℃ or below 32℃, the water temperature card will not be displayed.