The self-test GFCI conducts an automatic test every three seconds, ensuring it's always ready to protect. If the device fails the test, the indicator light flashes to signal that the GFCI should be replaced. It also has our proven SafeLock Protection feature: if critical components are damaged and protection is lost, power to the receptacle is disconnected. 15A 125V White Tamper resistant Self testing GFCI receptacle Mounting screws are shipped captive in the device and wall plate for easier installation High-impact-resistant thermoplastic construction Extra-long strap Button colors match the device face Dual-direction test and reset buttons Class A rated GFCI. Window Box.