Surge Protective Extra Heavy-Duty Duplex Receptacle offers increased transient protection, reliability and protection notification (Audible Alarm with LED Indicator). Specification grade surge suppressor receptacle with audible alarm and LED indicator, ideal for heavy duty power applications. By Pass & Seymour. Back & Side Wire, 20amp 125volt, White.FEATURES AND BENEFITS:• RoHS Compliant• Solid-state LED monitor has 25-year minimum life expectancy. A high visibility, wide-angle lens indicates protection is in place.• LED Indication: Steady green = protected, Flashing re = not protected, OFF = no power to unit• Audible alarm alert of MOV damage. Alarm able to be turned On/Off.• Wrap-around steel strap for structural integrity. Auto-ground is standard, for easier installation.• Impact-resistant thermoplastic exterior resists impacts and scrapes.• Triple-wipe, copper-alloy contacts for superior, more dependable connection.• External screw-pressure-plate back and side wire terminals including ground with external back wire clamps (exclusive) accept #14 - #10 AWG copper or copper-clad, solid or stranded conductors. External pressure plate feature allows two conductors to be terminated by a single screw.• Thermal protection in 3 modes. 3 17mm dual pack MOVs absorb up to 340 Joules of excess energy in each leg (L-N, L-G, N-G) with 24,000 amp current handling capability for full, equal and symmetrical protection. Protection response time in less than one nanosecond.