Amazon.ca Product Description Safeguard Your Entire Home Theater from Harmful Power Surges While Maximizing Its Performance Sudden power surges and voltage spikes on your AC power line, caused by devices inside and outside your home, can seriously damage your flatscreen and other home theater components. Common household appliances and electronics also can generate EM and RF interference that pollutes your AC power, limiting the performance of your home theater. The comprehensive solution that blocks harmful power fluctuations and maximizes AV performance: FlatScreen Home Theater PowerCenter 400. SurgeGuard, Dual Mode Plus and Patented Clean Power for Superior Surge Suppression, Plus Brilliant Picture and Sound High-capacity SurgeGuard and Dual Mode Plus technology detects and suppresses harmful surges and spikes before they can reach your components and damage their sensitive circuitry. Plus, an audible alarm and visual indicator alerts you to dangerous power fluctuations. Additionally, special surge protection for coax and phone lines makes your cable, satellite and RF antenna connections worry free. Better yet, patented Clean Power circuitry filters out "dirty power" on your AC power line, so you can enjoy clearer picture and sound from your home theater. From the Manufacturer Safeguard Your Entire Home Theater from Harmful Power Surges While Maximizing Its Performance Sudden power surges and voltage spikes on your AC power line, caused by devices inside and outside your home, can seriously damage your flatscreen and other home theater components. Common household appliances and electronics also can generate EM and RF interference that pollutes your AC power, limiting the performance of your home theater. The comprehensive solution that blocks harmful power fluctuations and maximizes AV performance: FlatScreen Home Theater PowerCenter™ 400. SurgeGuard™, Dual Mode Plus™ and Patented Clean Power™ for Superior Surge Suppression, Plus Brilliant Picture and Sound High-capacity SurgeGuard and Dual Mode Plus technology detects and suppresses harmful surges and spikes before they can reach your components and damage their sensitive circuitry. Plus, an audible alarm and visual indicator alerts you to dangerous power fluctuations. Additionally, special surge protection for coax and phone lines makes your cable, satellite and RF antenna connections worry free. Better yet, patented Clean Power circuitry filters out "dirty power" on your AC power line, so you can enjoy clearer picture and sound from your home theater.