Pass & Seymour Self-test GFCI from Legrand conduct an automatic test every three seconds, ensuring the device is always ready to protect. If the device fails the test, the red LED indicator light flashes to signal that the GFCI should be replaced. It also has our proven Safe Lock Protection feature: if critical components are damaged and protection is lost, power to the receptacle is disconnected. Do not be fooled by cheap generic knockoffs that do not meet safety standards. Designed to meet the latest UL standard for auto-monitoring (self-test), Pass & Seymour self-test GFCI let you spot ground fault trips quickly and resolve them safely and easily.