We provide a complete product series to protect different telecommunication or video signal transmission devices. ARS-004-S45 is perfect for internet equipments, ARS-004-N11 can be applied to protect telephone, fax machine, XDSL or ADSL devices, and ARS-004-Rxx is designed to protect surveillance camera and cable TV line. For this model, we inlcude different options of connectors, F female, F male, BNC female or BNC male connector. This provide more flexibility to your applications!