This Tripp Lite surge suppressor is designed to provide safe, reliable surge protection in harsh environments. A 420 joule rating can protect connected equipment against even the strongest surges. 6 outlets protect connected equipment against damaging surges, spikes and line noise. Convenient transformer outlets accommodate multiple transformers without blocking other outlets. A 6 ft. grounded cord reaches distant outlets. A lighted on/off switch with integrated circuit breaker provides power control over connected equipment. Breaker protects against dangerous system overload. Protected LED confirms that connected equipment is being protected. 4 safety covers shield unused outlets from debris and accidental contact. A rugged metal case stands up to the harshest environments. Integrated keyhole slots on bottom panel provide convenient wall/desk mounting. Tripp Lite will repair or replace any connected equipment damaged by surges, including direct lightning strikes, up to $10,000 and for life! As an added safety feature, the surge suppressors bright yellow color alerts you and others that power cords and tools are in use.