Package Included: 1 x Host 2 x Sensor 1 x User Manual Features: - Alarm Function When the temperature of the test exceeds the maximum or minimum temperature set by the thermometer, the thermometer will sound an alarm to remind you to adjust the temperature. - Temperature Trend Display 1. The temperature is displayed accurately to the decimal point and is more accurate. 2. Trend indication of 3 groups of temperature: for real time test, if the deviation between the test temperature and current temperature is more than 1 degree, the trend indication of temperature shows the sign of UP; if the indication between the test temperature and current temperature is less than 1 degree, the trend indication of temperature shows the sign of DOWN; if the deviation between the test temperature and current temperature is in the scope 1 degree in 1 hour, the trend indication of temperature shows the sign of PARALLEL. Description: 1.Easy to read LCD screen displays the current indoor outdoor temperature.When insufficient electricity,there are will be shown on the LCD screen. 2.With a temperature trend indicator arrow and daily high and low information. 3.Display stands upright for tabletop use or is wall-mountable. 4.Includes 24 hours high and low records for temperature. 5.The display console displays temperature,minimum and maximum temperature, which can be reset manually. Specifications: 1.433 Mhz transmission frequency 2.Update Rate: 10 seconds 3.Transmission range up to 328 ft(range maybe shorter based on interference present) 4.Indoor Temperature range:0℃~50℃(32 ℉ ~ 122℉) 5.Outdoor Temperature range:-40℃~60℃(-40 ℉ ~ 140℉) 6. Power Supply: AAA Battery(Not included) Note: 1. Do not install the reverse battery 2. Do not put the receiver near metal 3. Avoid transmitter directly in the rain 4. High-quality batteries for the use of main unit and transmitter better 5. The sensor search mode allows you to re-sync sensors without removing and re-inserting batteries. How to Install the Sensor: The thermometer's digital display is magnet-mountable on a fridge,or use the integrated keyhole for wall mounting. The wireless thermometer sensors are equipped with a spring-loaded clips with a Plastic grip to securely attached to the edge of a shelf.