Wireless Fridge Monitor to ensure your food and drinks are kept cool. Ironman 4×4 announce their new and improved wireless fridge thermometer and display Easy to install and set up with no wires to worry about. This new improved product has a range of up to 50m transmission. It updates every 60 seconds and is powered by AAA batteries which are also included. Internal temperature measurement ranges from -40º to 60ºC with ±1ºC accuracy, whilst ambient temperature measures from 0 to 60ºC. This is an essential accessory for every 4WD, caravan or camper trailer with a fridge/freezer on those long drives or camping.