The DTK-FPK4 is a fire alarm control panel surge protection kit that contains: - A DTK-120SRD surge protector that provides AC power protection for alarm panels with 54,000 amp surge capacity and EMI/RFI filtering. - A DTK-MRJ45C5E protector with RJ45 connections that protects the four pairs of an IP dialer circuit. - The kit is designed to provide both AC power and IP communication circuit protection for fire alarm systems in a single convenient package.