Ambient (receiver unit) temperature range: -10 ~ 60℃ 

Fridge (remote sensor) temperature range: -20 ~ 65℃ 

Temperature accuracy: +/-1.0 

Battery life: Approximately 12 months for receiver. Approximately 12 months for transmitter. 

Transmission frequency: 433MHZ 

Transmission range: 300 feet (60 meter) in open area 

Minimum/Maximum: Displays and records the minimum and maximum temperature 

Alarm thermometer : Yes , 

Both indoor and outdoor °F /°C: Selectable to degrees Celsius or degrees Fahrenheit 

Power requirement(receiver): 2XAAA LR03 batteries 

Power requirement(transmitter): 2XAAA LR03 batteries