The power supply is UL certified and it is made of epoxy powder coated copper free aluminum with stainless steel cover bolts and hinges. It is pre-mounted with fuses. terminals. RJ45 coupler and 115/230 V AC transformer. which provides 24 V AC for explosion-protected cameras. To enhance security and ease-of-installation. the power supply has three open 3/4' NPT cable entries for cable conduits. The power supply can connect to 120 V AC. 230 V AC. or 24 V AC. The operating temperature ranges between -40°C to 55 °C(-40°F to 131 °F).