Features 1、To meet different needs, it is suitable for medicine cabinets, aquariums, and refrigeration industries. 2、Light in weight and compact in structure, quick installation, no complicated procedures. 3、The external sensor has a long cable to meet the requirements of long‑distance measurement. 4、The thermometer has good characteristics, high stability, and accurate test results. 5、With high temperature and low temperature limit setting alarm, Celsius and Fahrenheit conversion function. Specification Item Type: Thermometer Model: TM803 Material: ABS Power Supply: 1 x AAA1.5V (battery not included) Application: Temperature Test Basic Skills Range Accuracy Internal Temperature -10℃~50℃ ±1℃ 14℉~122℉ ±1.8℉ Outside Temperature -50℃~70℃ ±1℃ -58℉~158℉ ±1.8℉ Special Function TM803 Maximum Value / Minimum Value √ High Temperature and Low Temperature Upper and Lower Limit Setting Alarm √ Celsius/Fahrenheit Switching √ Sampling Rate 1 time/10s Long-Distance Measurement The external sensor cable is 3 meters long Screen Size Approx. 47x20mm / 1.9x0.8in Power Supply 1.5V (AAA) (not included) Package List 1 x Thermometer (Battery Not Included) 1 x Suction Cup 1 x Manual 1 x Double-Sided Sticker