... supply: 1 button battery Digital Fridge Freezer thermometer temperature SensorFeature:Application: measuring the temperature in refrigerators, iceboxes, lounges, cultivating-houses, ... 1CUse environment: Temperature: 0C ~ +60CHumidity: 20% ~ 85%Power supply: 1 button battery (LR44, 1.5V)Sensors: NTC sensor(1 meter ... Digital thermometer1 x Manual Digital Fridge Freezer thermometer temperature Sensor