Indoor/outdoor wireless refrigerator thermometer with wide temperature range: Indoor 10C to 60C (14F to 140F); Outdoor 40C to 60C (40F to 140F). Transmission range up to 100 m / 328 ft in open area. Suitable for fridge, freezer or outdoor use to help ensure safe food storage. Audio alarm and alerts: The wireless thermometer includes audible and visual alarms when temperature exceeds preset minimum or maximum settings. After setting the alarm temperature, a short press on the alarm button displays an alarm message, and the alarm function is enabled by default. Easy to read display and data history: Largedigit LCD screen for clear readings. Records minimum and maximum temperatures to provide historical readings, allowing you to monitor temperature changes in your refrigerator and provide extra protection for your food. Use scenarios: Inhome kitchen: monitor fridge and freezer temperatures to maintain food safety and prevent spoilage. Outdoor or nonclimatecontrolled spaces: use in garage, shed, or during camping/catering to keep perishables within safe ranges. Vacation homes or portable setups: track temperature in RVs, cabins, or temporary storage areas to protect stored items on extended trips.