"Thermal Thermometer Strips have self adhesive on the back which peels for easy application to the forehead. Ranges from 94.6 - 104.6 Fahrenheit. Thermal Forehead Thermometer Strips Have Liquid Crystals That Change Color To Indicate Temperature. Therma Strip, Forehead, Disp,94.6-104.6 F Fahrenheit, 94.6 - 104.6Degrees Liquid Crystal, Self-Adhesive, Can Be Used As An On-Going Temp Taker. 100 Ea/Bx, 5 Bx/Cs, 500 Ea/Cs. Anesthesia and PACU (with adhesive backing)." Case Pack 500