The refrigerator thermometer includes 1 indoor temperature built-in the console and 1 remote sensor, which can monitor indoor and outdoor temperature. indoor and outdoor MAX & MIN temperature records in °F or degree centigrade. Temperature trend arrows indicate whether it's getting warmer or colder nearby remote sensor. When indoor or outdoor temperature your pre-set minimum and maximum alarm value, the thermometer will make audio alarm to remind you, allowing you to be aware if adjustments are necessary for your household. Features - Color: White. - Material: ABS. - Size: About 9.8 x 8.5 x 2.2cm. - Temperature Range: Outdoor -40°F to 140°F (-40 degree centigrade to 60° C); Indoor 32°F~122°F(0 degree centigrade to 50° C). - Transmission Range Up: sensor without up to 100m. - Includes 1 indoor temperature built-in the console and 1 remote sensor, which can monitor fridge and indoor temperature. - Easy to read LCD screen displays the current indoor outdoor temperature. When insufficient electricity, there are will be shown on the LCD screen. - With a temperature arrow and daily high and low information. - Display stands upright for tabletop use or is wall-mountable. - Includes hours high and low records for temperature. - The display console displays temperature,minimum and maximum temperature, which can be reset manually. - Powered by 2 AAA batteries(Host) and 2 AA batteries(Remote sensor). - Note: The sensor is not waterproof, so please keep it from rain. Package list: 1 x Fridge Thermometer 1 x Remote Sensor