The Top Brand 6-Outlet 300J Surge Protector protects your electronics when voltage fluctuates, swells, or spikes. These abnormal conditions in the power grid can damage sensitive home electronics. This surge protector creates a layer of defense that protects electronic devices like hard drives against system crashes, data loss, and damage. It is 300J and is an ideal solution for small home appliances, general household electronics, entry-level computers, printers, and ADSL modems 300J.