【Temperature Range】Indoor/Outdoor Thermometer Range: Indoor -10°C~60°C (14°F~140°F), Outdoor -40°C~60°C (-40°F~140°F), transmission. The range is 100M/328ft (public). You can use it in the refrigerator, freezer or outdoors to store food safely. 【Audio Alarm】The wireless thermometer console emits audible and visual alarms when the temperature exceeds the preset minimum and maximum alarm settings. 【Easy-to-Read Display】Large digital LCD display. Minimum and maximum temperature recording provides historical temperature records. With this function, you can easily monitor the temperature changes of the refrigerator, providing double protection for your food safety. 【Multiple Installation Methods】 The wireless thermometer is easy to install. The display unit can be placed on a table, hung on the wall, or attached to the refrigerator with magnets. Wireless sensors can be attached to doors or hung on walls. 【Simple Operation】 There are 6 function keys on the main unit and a signal light on