Wireless Fridge Freezer Thermometer with Alarm, 330FT Sensor

【Refrigerator Freezer Thermometer with Alarm, Widely Used】: With 330FT/100M Monitoring Range, it can be used in the FRIDGE and FREEZER, anywhere you want. Advanced wireless patented technology enables more stable and reliable data transmission, updated data every 30s.
【2 Customizable Temperature Alerts】: Once the temperature exceeds the preset range, the alert will continue to sound for 1 minute & up to 90DB. FRIDGE and FREEZER alarms can keep your family & property from being damaged due to temperature changes. Set temp alerts to monitor all important locations without worry. The package includes 2 sensors.
【Battery Powered, USB for 3 Adjustable Backlight】: When powered by battery (not included), you can read the rv refrigerator thermometer at day, the screen lights up in color when you touch backlight button and goes off after 10s. With attached USB cable for full functional screen, including constant backlight and adjustable settings (high-low-off).
【Functions】: The display of the rv refrigerator thermometer is in several colors and the numbers are big enough for you to see them from the side of the room. Our deep freezer thermometer with alarm provides real-time temp humidity readings. You can also see the comfort index, 24-hour MAX/MIN record and temp humidity trend arrows on the display.
【Pre-calibrated Sensor】: This deep freezer thermometer with alarm is smart and accurate, with a temperature accuracy of ±1.8°F and humidity of ±5%. Sensor temp range: -58 °F to 158°F; humidity range: 20% to 95%, perfect for refrigerator, also widely use for different occasions.