Surge protection. To protect the system components in antenna reception and distribution systems against transient overvoltages. Reduces overvoltages between the inner and outer conductors to safe values. For satellite and terrestrial reception and distribution systems. Pass-through for 22 kHz and DiSEqC signals. Meets the requirements of IEC 61643-21:2000-09/E, EN 61643-21 (VDE 0845 Part 3-1) : 2000-11. Impedance: 75 Ohm. Indoor installation.