Philmore 1 GHz 3-Way Shielded CATV, TV Splitter Indoor / Outdoor with Weather Caps; 8002PL Zinc die cast, nickel plated housing for corrosion resistance Tongue and groove back plate design provides over 120dB RFI shielding PCB design for best performance, 5MHz - 1GHz All "F" ports with protective weather cap for unused ports 5.7dB output