Add switch segments in harsh environments with the Black Box® Hardened Mini Industrial Switches.Featuring a rugged industrial case, they're particularly ideal for any factory application where you need unmanaged switching between multiple traffic segments. Or use them in power plants, mining and military sites, or anywhere temperature and contaminants would ordinarily wreak havoc on the switching circuitry.The Hardened Mini Industrial Switches function at temperatures ranging from 14o to 140° F (-10 to +60° C).