Lightning and power surges can ruin your electronic equipment while changes in voltage can cause lockups and loss of work. The 7-Outlet Essential SurgeArrest® Surge Protector from APC® protects your equipment from these threats. It offers optimal performance with a 'let-through rating' of less than 330 V that indicates the maximum voltage level that can possibly reach your equipment after a surge or voltage spike has passed through a surge protector. Attenuating EMI/RFI line noise that can cause data errors and keyboard lockups, the Essential SurgeArrest® ensures enhanced performance of protected equipment. With 30 kAmps Spike (Peak Current Common), the surge protector is ideal for high-end home equipment and business applications such as small office and home computers.