ESP Digital QC Surge Protector/Noise Filter (Model D5133NT) - 120 Volt, 15 Amp ESP (Electronic Systems Protection) Model: D5133NT Industrial-grade surge and noise protection: protect sensitive electronics from lightning strikes, surges, transients, noise and over voltage events 120 volt / 15 amp with (3) AC outlets (RJ-45) network protection, (RJ-11) phone line protection Special filter circuits screen electrical noise to prevent disruption, data loss and phantom performance problems