The black J25B A/V Power Conditioner with Battery Backup helps protect audio/video systems from power spikes and surges. Its isolated power filters are designed to eliminate electromagnetic and RF interference. It has noise filter banks, which reduce electromagnetic interference to help ensure great picture and sound quality. The power conditioner has six battery backup outlets and two outlets that only receive surge protection. It features a building wiring fault indicator LED, which will let you know of any problems with your building's internal wiring. The J25B also provides clean and safe power to connected equipment in the event of a power outage.