Receptacle 4-in-1, NEMA 5-15R. 2-pole, 3-wire. Industrial series extra heavy duty hospital grade. Straight blade. Grounding. Surge with indicator light. Side wired. Steel strap. Leviton surge protection devices can be used individually or as part of a coordinated application strategy, to protect sensitive electronic equipment, in industrial, commercial and residential locations, from the stress and degradation inflicted by voltage transients. Leviton surge protection devices are compliant with UL 1449 Standards. Leviton outstanding surge protection devices divert damaging voltage transients or surges, away from electronic equipment. Transients are diverted away from sensitive micro circuitry, providing protection against catastrophic failure, costly downtime and data disruptions.