CyberPower RKBS20ST6F12R L5-20P 20A 18-Outlet 1U RM Rackbar Surge Suppressor Surge Suppression - 1,800 Joules 18 NEMA 5-20R output receptacles (6 Front and 12 Rear) 120V AC - 50/60Hz - 20-amp electrical capacity with circuit breaker 1U Rack Mount - Rugged industrial-grade metal housing Protection Modes : N-H, N-G, and H-G