Ckeyin Professional Infrared Thermometer Clinical Large LCD Non-contact With Hygienic Fast and Accurate &deg;C Or &deg;F &deg;C and &deg;F Switch --Body, Room and Surface Clock Backlight Temperature 32.0&deg;C-42.9&deg;C (89.6&ordm;F-109.2&ordm;F) Reading Band Press the main button for one second consecutively and all symbols will be displayed on the LCD. then the last temperature taken will be shown on the display for 2 seconds. After that, LCD will display"---" and the buzzer will keep for one time. The product is now ready to take a new measurement, and "C or F " will blink on the display. The thermometer can be shut down automatically or press main button to turn off. Package Content: 1 x Infrared Thermometer; 1 x Stand; 1 x CR2032 Lithium button battery; 1 x User's Manual.