Due to its specific design and materials,
the Fischer Freedom™ Series is rugged enough to withstand extreme operating temperatures. The mated connectors, equipped with functional electrical wiring, are placed inside a climatic chamber; first at minus 55 °C and then up to 135 °C. The mated connectors are linked to a battery on one end and to a plug with integrated LED on the other. The LED remains operational during the whole process, showing the connectors are resistant to high and low temperatures.