Mammoth XXL digital thermo-hygrometer with external probe.

The LCD display allows you to read at a glance: internal temperature, temperature detected by the probe and relative humidity detected by the probe. Storage of maximum/minimum values. Battery included.
 
Mammoth XXL digital thermo-hygrometer technical specifications:
Temperature range: 0°C to 50°C
Humidity Range: 25-90%
Accuracy: Temp. ± 1 °C Humidity ± 5%
Conversion to °C and °F
Use a 1.5 volt AA battery.