Leviton T7591-W 15 Amp, 125 Volt, Tamper Resistant SmartlockPro Combination GFCI Outlet with Sensor-Guidelight, Wallplate and Screws Included, White TR symbol on residential receptacles assures they meet the 2008 NEC requirement A shutter mechanism inside the device blocks access to the contacts unless a two-prong plug is inserted, helping ensure foreign objects will be locked out. Light sensor provides automatic ON/OFF features Long-lasting, energy efficient LEDs with 20-year life expectancy no bulbs to replace Patented lockout feature for added safety prevents RESET if GFCI is not operating properly