AV G-Type Rack Power Filter 120V 15A LED & display dimmer:Adjust the unit's LED and display brightness independently of each other to suit your individual tastes and environment. Sequenced turn on/off:Helps power on components in the proper order to prevent speaker stress. Proper sequencing can also help manage current draw on startup to prevent unnecessary circuit breaker tripping. LED status indicators:Quickly understand unit and power status with visual indicators. Isolated filter banks:Eliminates electromagnetic and radio frequency interference (EMI/RFI) as a source of audio-video signal degradation. Dataline Surge Protection:Provides protection of connected equipment from power surges on the data lines.