Package includes 1 indoor temperature sensor built into the indoor console and 2 wireless remote sensors. It can monitor 3 kinds of temperature and display all simultaneously, with MAX and MIN temperature records of the past 24 hours for home indoor, outdoor and fridge. Wide range and performance Outdoor temperature range: 40F to 140F (40C to 60C) with accuracy of ±2F. Indoor temperature range: 32F to 122F (0C to 50C) with accuracy of ±1C. Wireless sensors have a 100m/328ft open area remote range with strong signal penetration. Suitable for fridge, freezer or outdoor use, providing double protection to food safety. Easy setup and operation Mount the display unit directly on your refrigerator or freezer using the back four integrated magnets, or hang on a wall with the keyhole, or simply place it on a table. The wireless sensor can clip onto a door or hang on a wall. The main unit has 6 function keys and the transmitter includes a signal indicator. Use the buttons to turn the alarm on/off, switch between Celsius and Fahrenheit, and clear the MAX/MIN records. Alarm settings When indoor or outdoor temperature exceeds your preset minimum and maximum alarm values, the thermometer provides audible and visual alerts. Wireless indoor/outdoor monitoring with audible alarm helps you notice adjustments needed for your household. Use scenarios Kitchen fridge monitoring: Place the display in the kitchen and keep sensors in the fridge and ambient indoor area to monitor temperatures simultaneously and review MAX/MIN history over the past 24 hours to ensure food safety. Garage, shed, or outdoor storage: Install the display on a wall in a garage or shed and place a sensor outside to monitor outdoor conditions while also tracking indoor ambient temperature, with audible alarms if conditions go out of range. Nursery, pantry, or greenhouse environments: Use the unit to monitor indoor room temperature and ensure storage areas like pantries or greenhouses stay within safe ranges, using the fridge sensor for refrigerated items and the outdoor sensor for ambient conditions.