Description: It has the characteristics of repeated use, not easy to break, fast temperature measurement, convenient and quick. Pasted on the forehead, it will change colors. Simple and convenient. Display, quick and easy to read. Hydrargyrum free, bendable and not easy to, safe to use. Specification: Temperature range: 35~40 degrees Material: PET+LCD Size: 12*90mm Color:Black Package include: 10pcs Forehead Temperature Sticker Instructions for use: Place the patch in the middle of the forehead for 15 seconds. The scale displayed in green is the current forehead temperature. If there is no green scale, it means the scale of body temperature is between amber and blue. Please use this patch at room temperature (21-23C; 70F-74F). Do not expose to the sun. If the liquid crystal does not change color, you can put the liquid crystal product in the refrigerator (no freezer) for 30 minutes to restore the color change effect. Note: Please allow slight dimension difference due to different manual measurement. Please note that slight color difference should be acceptable due to the light and screen.