2 31AdtempTM421 Digital Ear Thermometer1. The Advantages of this Ear Thermometer . . . . . . . .3-42. Important Safety Instructions . . . . . . . . . . . . . . . .4-53. How this Ear Thermometer Measures Temperature . .54. Control Displays and Symbols . . . . . . . . . . . . . . . .5-65. Directions for Use . . . . . . . . . . . . . . . . . . . . . . . .6-76. Fahrenheit to Celsius Switchable . . . . . . . . . . . . . . .77. How to Recall 12 Readings in Memory Mode . . . . .7-88. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . .89. Cleaning and Disinfecting . . . . . . . . . . . . . . . . . . . .810. Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . .911. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .912. Technical Specifications . . . . . . . . . . . . . . . . . . .9-1013. Website . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1014. Contact Information . . . . . . . . . . . . . . . . . . . . . . . .3114. Contact InformationTo register your product and obtain further detailed userinformation about our products and services visit us at:www.adctoday.comand follow the links.For questions, comments, or suggestionscall us toll free at:1-800-232-2670American Diagnostic Corporation55 Commerce Drive, Hauppauge, New York 11788Telephone: 631-273-9600 • Fax: 631-273-9659Email: info@adctoday.com