Premium protection for essential network workstations, telecom systems, point-of-sale equipment and audio/video systems, the ISOBAR4ULTRA Isobar 4-Outlet Surge Protector features a network-grade surge protection rating of 3330 joules to defend your sensitive electronics against even the strongest surges and spikes. In fact, Tripp Lite will repair or replace any connected equipment damaged by surges, including direct lightning strikes, up to $50, 000 for life (valid in the U. S., Canada and Puerto Rico only). Because residential power outlets have three wires hot line (H), neutral (N) and ground (G) the ISOBAR4ULTRA protects all three, covering the two protection modes: full normal mode (H-N) and common mode (N-G/H-G). Your devices plug into four widely spaced NEMA 5-15R outlets, which are arranged in two exclusive isolated filter banks. These internal barriers filter out electromagnetic interference (EMI) and radio frequency interference (RFI) that can disrupt your electronics and inflict hardware damage or data loss. Included safety covers block accidental contact with unused outlets. An integrated 12A circuit breaker protects all outlets and shuts down connected equipment in case of overload. The lighted on/off switch provides one-touch control over connected equipment. Diagnostic LEDs confirm power, protection and line fault status. The six-foot AC power cord includes a space-saving right-angle NEMA 5-15P plug.