Leviton W7599-TRE 15 Amp, 125 Volt, SmartlockPro GFCI Duplex Receptacle, Weather-Resistant, Tamper- Resistant, Wallplate sold separately, Black 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. Patented lockout feature for added safety prevents RESET if GFCI is not operating properly Advanced electronics design provides superior resistance to electrical surges and over-voltages Expanded wiring options with eight back-wire holes (two for each line and load connection) plus ground with an internal clamp