Feature - These Products Are Designed To Protect Fax Machines, Modems, Electrical Transients, Dialer And Payphones - Protects Your Product From The Damage Of Lightning And Surge Easy To Install And Use. Install Before Telephone Or Fax Thunder Lightning Arrester Protection Device - This Module Can Be Automatically Reset After Single Electric Strike - They Are Configured With I/O Connections Via RJ11 Jacks And 5 Feet Long RJ11 Cable Specification - Rockware TSP / RJ11 / 30 Protects Two Center Pins On RJ11 Jack - Ultra Fast Response Time (Less Than 1ns) - High Power Handling Capability Of 10kA (8/20 Micro Sec. Waveform) - EMI And RFI Filtration - Multi-Stage Circuitry - Available For One Pair Line - Fuse Replacement - Suitable Fax Machines, Modems, Electrical Transients, Dialer And Payphones What In The Box - 1 x 3P RJ11 Telephone Surge Protector Lightning Arrestor Fuse Replacement Warranty 1 Months Warranty Local Manufacturer Warranty