The APC H10 Home Theater Power Conditioner will protect your high performance audio and video (A/V) system from damaging power surges, spikes and lightning. Protection is guaranteed. Isolated noise filter banks will eliminate EMI/RFI as a source of audio and video signal degradation. Data-line surge protection jacks will stop surges traveling over phone and modem or DSL lines. Digital Satellite System, Cable Modem, and CATV Coaxial Cable lines are equally protected. Sequenced turn-on and off ensures that connected equipment is powered-up/down in the proper order and with the right amount of delay between the stages. This feature is pre-programmed with a six second delay. This delay feature eliminates transients that can affect connected components, e.g. digital projectors.