Thermometer
From Amazon
TFA Dostmann Wireless Thermometer Trio, 30.3062.10, incl 2 transmitters, ideal for fridge, freezer, aquarium, waterproof cable sensor, grey
Trekkinn
Tfa Dostmann 30.3062.10 Trio Wireless Thermometer Grey
Conrad Electronic
TFA Dostmann TRIO Wireless thermometer Anthracite