Why Choose Trustown? 1. 4 In 1 Multifunction, Suitable For Ear, Forehead, Environment And Object. 2. Backlit Lcd Display, Silent Mode, One Second Measurement, 10 Seconds Auto Off. 3. 35 Memory, &Deg;C/F&Deg; Switch, Intelligent Fever Alarm. How To Use It? 1. Mode Switch: The Thermometer Is In Forehead Mode With The Removable Cover In Ear Mode. When The Thermometer Is Powered Off, Press The "M" Button For 3 Seconds To Enter Environment And Object Mode. 2. C&Deg;/F&Deg; : Remove The Batteries, The Switch Is In The Compartment. 3. Shutdown: Automatic Shutdown After 10S Inactive Or Pressing The Power Button For 6S. Characteristics: Dimensions: 17 X 4.7 X 4.7 Cm. Weight: 120G. Unit Temperature: C&Deg;/F&Deg; Switchable. Reminder: 35 Measurements. Automatic Shutdown: 10 Sec. Body Measurement Range: 32&Deg;C-42.9&Deg;C. Ambient Measurement Range: From 0 &Deg;C To; 100&Deg;C. Accuracy: &Plusmn; 0.4&Deg;F (&Plusmn; 0.2&Deg;C). Power Supply: 2 Aaa Batteries. Box Contents: 1 Forehead And Ear Thermometer. 2 Aaa Batteries. 1 X Portable Bag. 1 User Manual (French Not Guaranteed). Normal Body Temperature: Oral Temperature: 36.3~37.2&Deg;C. Rectangular Temperature: 36.3~37.5&Deg;C. Armpit Temperature: 36.0~37&Deg;C. Ear Temperature: 36.1 ~ 37.0 &Deg;C. Forehead Temperature: 36.0 ~ 37.5 &Deg;C.