Six-outlet surge protector features a surge protection rating of 3840 joules to defend your sensitive electronic components against even the strongest power surges and spikes. All six NEMA 5-15R outlets are widely spaced to accommodate bulky power transformers without blocking adjacent outlets. Large toroidal chokes, ferrite rod-core inductors, HF/VHF capacitors and metal oxide visitors combine to block disruptive EMI (electromagnetic interference) and RFI (radio frequency interference) line noise up to 80 decibels that can damage equipment or destroy data. Automatic shutoff permanently cuts power to the outlets if the protection circuit is incapacitated to prevent equipment damage and indicate that a replacement is required. Included safety covers prevent dust and debris from falling into unused outlets. The lighted on/off switch provides one-touch control over connected equipment. Diagnostic LEDs confirm power, protection and line fault status at a glance.