3-MODE SURGE PROTECTION: The AG3000 surge protector protects HVAC systems and appliances through a triple protection mode (L-G/L-L/L-N), shielding power surges and preventing potential damage ADVANCED TECHNOLOGY: AG3000 With TPMOV technology, provides protection from a greater variety of electrical failures, ensures longer life and higher thermal safety compared to standard protectors All-Weather Toughness: Type 4X waterproof enclosure (IP66 rated) withstands -40°F to 185°F extremes. Corrosion-resistant for coastal/outdoor HVAC units INSTANT STATUS CHECK: The green LED indicator light on the lightning arrester shows the status of the lightning protection equipment, providing you with real-time monitoring throughout the day and maintaining the safety of the equipment WIDE RANGE OF APPLICATIONS: Surge protectors are rugged enough to withstand a wide range of conditions both indoors and outdoors.120/240 VAC single split phase HVAC surge protector for use on a variety of HVAC equipment AG3000 120/240V HVAC Surge Protective Device with TPMOV Technology, 3-Mode Mini Split Surge Protector, Watertight Enclosure, Universal for HVAC Equipment and Home Appliances, Easy Monitoring