Wireless Refrigerator/Freezer sensor/alarm

Monitors the internal temperature of your refrigerator/freezer/wine cellar and lets you know if there's a problem.

Refrigerator Thermometer Audible Alarm for Freezer Kitchen Home

Temperature Sensor 433 MHz from Nico on Tindie

Tinovi LoRaWAN LW-1 device with sensor options from Tinovi on Tindie

Wireless Refrigerator/Freezer sensor/alarm from Sensible Living

When the distance is too far or there are too many walls and/or floors in the way the Range Extender will help

Range Extender

Temperature, Humidity and Moisture sensor

Temperature, Humidity and Moisture by Sensible Living LLC on Tindie

MLX90614ESF-DCI Sensor Module from EASYLIFE on Tindie

QAir - Connected air quality sensor -CO2 - desktop from Think and

Digital Temperature Sensor Thermometers: Includes one refrigerator thermometer and one freezer thermometer that transmit readings to the wireless

AcuRite Digital Wireless Fridge and Freezer Thermometer with Alarm and Max/Min Temperature for Home ,LCD Display, Restaurants (00986M), 0.6, White

Best WiFi Freezer Alarms & Monitors

Tuya Smart Wifi Water Temperature Humidity Sensor Indoor, 53% OFF