The All Weather In-Ceiling series has a weatherproof construction for installation in more extreme environments such as bathrooms, beach houses, saunas or even boats. It offers long-term high performance reliability being built with heightened levels of water, dust, corrosion, UV and temperature protection. These speakers feature super-discreet Stainless Steel grilles and are certified against salt spray, UV stability, water, vibration and anti-corrosion. Operating temperature range: -29° to 174° F / -34° to 79° C.