The CyberPower Essential Surge Protector CSB404 offers vital surge protection for common home and office devices such as computers and electronics. It prevents spikes in energy caused by storms and electrical power surges from reaching your electronic equipment. The CSB404 provides 450 joules of protection with 4 outlets and a power cord (4 ft.). Features of the CSB404 include automatic shutdown, metal oxide varistor (MOV) technology, an EMI/RFI noise filter, and impact-resistant casing. This surge suppressor comes with a Limited Lifetime Warranty and a Connected Equipment Guarantee.