Lev-Lok SmartlockPro Self-Test GFCI Duplex Receptacle Outlet, Extra Heavy-Duty Hospital Grade, Power Indication, 15 Amp, 20 Amp Feed-Through, 125 Volt, Modular (line) and Back or Side Wire (load), NEMA 5-15R, 2-Pole, 3-Wire, Self-Grounding - Red Mating Lev-Lok Wiring Module Required for Use