Dual ST, 10km, 10/100/1000BASE-T (RJ-45) [100 m/328 ft.] to 1000BASELX/LH 1310 nm single mode (ST) [10 km/6.2 miles]. Extended Temperature, terminal block power connector for external power source. Perle's Industrial Temperature Media Converters transparently connect copper to fiber in locations that are exposed to harsh extended temperatures of -40F to 167F ( -40C to 75C ).