Advanced surge protector to help protect your sensitive audio video components. 8 colour coded sockets for ease of identification Harmful power surges & voltage spikes can travel up AC power & coax connections & damage your components. Lightning automatic garage doors power tools refrigerators & fluorescent lights can all cause power surges & voltage spikes that could damage the sensitive electronic circuitry of your connected audio video components. Ordinary surge protectors or so-called value brands often fail to provide the adequate level of protection your AV components need. Plus standard surge protectors often cause as much as 20 to 30d B of signal loss which can adversely affect the output performance levels of coax connections. Proper connection to an advanced surge protector that offers integrated system protection can help minimize the risk of permanent surge damage.