Compact Cube DesignSmall and portable cube shape saves space, easy to carry and use anywhere.1-to-4 Outlet ExpansionExpands 1 US standard socket into 4 AC outlets for multiple devices.USB Charging PortsBuilt-in USB ports for convenient charging of phones, tablets and gadgets.US Standard PlugCompatible with American 120V power systems for home, office and travel.Safe & StableOver-current, short-circuit and fire-resistant protection for daily safety. | Cluzine | | US Plug Cube Socket Adapter 1-to-4 Outlets, Multi-Function Power Strip with USB Charging Ports | Black | Best Buy