10/15/20Pcs Convenient Forehead Head Strip Thermometer Plastic Color-changing Body Temperature Sticker Test Stickers Baby Care

Temperature range: 35~40 degrees Size: 16*90mm 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 (21-23°C; 70°F-74°F). ●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.