Why iBetterLife Wireless Indoor/Outdoor Alarm Thermometer?
--[2023 New Version]--
1. Change the order of the buttons to make the operation and use of this thermometer more user-friendly and easy; [ALARM SENSOR 1 to SENSOR 1; ALARM SENSOR 2 to SENSOR 2; INDOOR SENSOR to INDOOR]
2. The display screen is further improved, especially the resolution upgrade to 0.1°C (0.1°F), which make the readings more accurately to reflect the current temperature;

Temperature Alarm Setup Mode
1. Press INDOOR or SENSOR ALARM Key 3s to enter into temperature alarm setup mode;
2. When the number of max/min temperature flashes, press "+" or "-" key to increase or decrease the value;
3. Press the alarm key again to confirm and finish setting.
You can also use the alarm as a reminder.
* When the fridge or freezer door being held opening for long time, the alarm will ring up as the temperature reach the specified value you set before

Digital Freezer Thermometer with 2 Wireless Sensors and 3 Audible Alarms
Measurement Range:
Indoor Temperature range: 0℃～50℃(32℉～122℉)
Outdoor Temperature range: -40℃～60℃(-40℉～140℉)
The monitoring resolution is ± 2 ℉ (± 1 ℃)
Transmission range up to 30m (98.4 ft). (range maybe shorter based on interference present).
Temperature test period: 10s
SENSOR Update Rate: 60s

Note
***Please use lithium batteries which are ideal for very low temperatures, that it will work longer and better.
At the same time, it is only splash-proof. It can not be completely soaked and wet, especially do not be exposed to the rain.
***If you buy 2 fridge thermometers, they will conflict with each other. In this case, please install one of them first. Then, install the other after the first thermometer is stable connected. Finally, you will get accurate readings from them without interference.