Just power it up. 1200 joules. 1: 5 V / 1.2 A USB. 1: 5 V / 3 A USB C. What is a power surge? Power surge is a very brief spike in your power or TV cable line. It can be caused by thunderstorms, changes in the power load from appliance going on and off, problems with your local utility company and more. Why worry about power surges? The investment you've made in your home entertainment system, not to mention your home, can be wiped out in an instant. At a minimum, surge can reduce the lifespan of your equipment. How does surge protection work? In a power surge, excess energy is absorbed by a component called an MOV (Metal Oxide Varistor). This component absorbs excess energy and releases that energy as heat. If the MOV is overloaded, there can be sparks and fire. What is a joule rating? This number represents how much energy an MOV-based surge protector can absorb in a single event without failure. Higher joule ratings indicate greater protection. $75,000 warranty protection. ETL listed - Intertek. Allied-Green.com. We invite you to visit Allied-Green.com. Made in China.