The CyberPower Home Office Surge Protector P4WSU expands a household outlet to safely and conveniently power several devices at a single location anywhere in the home. The wall tap design and swivel outlets make it easy to accommodate up to four power cords in tight plug-in locations. The four 4.2-Amp USB charging ports also swivel for efficient cord management. The P4WSU provides peace of mind with 900 joules of surge protection. The EMI/RFI Noise Filter limits electromagnetic and radio frequency interference to improve TV picture and sound quality. Plus, it's backed by a Limited Lifetime Warranty and a $75,000 Connected Equipment Guarantee.