Dual Wireless Sensor: With the console and 2 wireless sensors, can be used in the freezer and acts as a thermometer for indoor and outdoor use. Additionally, the indoor temperature and 2 groups of refrigerator/freezer appliances or the outdoor temperature can be displayed simultaneously. Large LCD Screen: A large LCD screen can display the temperature of the base station and a transmitter at the same time. Thermometer range: indoor (-10 ~ 60 / 14 ~ 140 ), outdoor (-40 ~ 60 / -40 ~ 140 ). The accuracy can reach up to 1C/2F. The transmission range is 100m/328ft (open area). Sound Alarm Reminder and Max/Min Recording: This wireless refrigerator with acoustic alarm function. You can manually set the maximum and minimum alarm value. The audible alarm sounds when the temperature value reaches the preset limit for the maximum or minimum alarm value. Records min and max temperature provides historical temperatures over the last 24 hours. Easy to use: There are 6 function buttons on the weather station and a signal display on the transmitter. Simply press the corresponding button to turn the alarm on/off, switch between Celsius or Fahrenheit, and clear MAX/MIN data sets. The compact, user-friendly design makes it perfect for all types of refrigerators or freezers. Multiple Installation Options: The wireless thermometer is easy to install. With built-in magnets, a hanging hole and a stand on the back, you can attach the main unit to your refrigerator door, hang it on the wall or place it on the table. 2 sensors with clips and hanging holes on the back, convenient to fix or hang on the shelf. Notice: 1. Do not freely disassemble the product. 2. While the display is not clear, please change the battery. 3. It will not alert you immediately when the temperature exceeds the preset value. It will compare the temperature after 10 minutes. And when the temperature reaches the alarm value, the thermometer will sound immediately. 4. The first time you use the hygrometer-thermometer or move it to another location, it will take several hours to get the correct result from the hygrometer. Temperature Alarm Settings: Step 1: Press the indoor alarm or sensor button for 3 seconds until the MAX value flashes. Step 2: Press / - to set the alarm value of MAX and press the same alarm to confirm. Step 3: Then the MIN value flashes. Press / - to set the alarm value of MIN and confirm it as well. Features: Indoor temperature range: -10~60 (14~140). Outdoor temperature range: -40 ~ 60 (-40 ~ 140). Transmission range up to 30 m (98.4 ft). (Area may be shorter due to interference present). Temperature test duration: 10s SENSOR 1 update rate: 57 s SENSOR 2 update rate: 67 s Main unit: Power supplies: 2 AAA batteries (not included) Dimension: 9.5*8*2cm Weight: 100g Channel: Power supplies: 4 x AA batteries (not included) Dimensions: 10.5 * 3.5 * 1.5 cm Weight: 38g (each) Scope of delivery: 1 x refrigerator thermometer 2 x sensors 1 x operating manual use