Power surges and lightning strikes are not the only things that can damage your home electronic equipment. Simply switching appliances on and off can create electrical imbalances that cause cumulative, permanent damage to your computers, peripherals and electronic equipment. Using advanced design elements and top-quality construction as well as superior circuitry, the E-Series offers complete protection. Features: Earths AC power with 3-line protection through all 4 sockets; Delivers optimal, safe AC power through a heavy-duty cable; Safeguards your phone, modem and DSL lines; Creates an uncluttered workstation area free of cable-tangling mess.