CyberPower RKBS20S4F8R 20A 12-Outlet 1U RM Rackbar Surge Suppressor Surge Suppression - 1,800 Joules 12 NEMA 5-20R output receptacles (4 Front and 8 Rear) 20V AC - 50/60Hz - 20-amp electrical capacity with circuit breaker 1U Rack Mount - Rugged industrial-grade metal housing