About this item THREE NEMA 5-15R SURGE PROTECTED OUTLETS: Provide 600 joules of protection for personal electronics, computers, routers, and modems. TWO USB CHARGING PORTS: 2.4 Amps shared to quickly charge USB devices such as smartphones, iPads, tablets, and other electronic devices. LED INDICATOR: Lights to indicate the surge protector status is protected. EMI/RFI Filters: Filters against electromagnetic interference and radio frequency interference ensuring clean power for connected equipment. Product dimensions: 4.8 x 3.6 x 2.1 inches.