The PowerCube Original USB can be used standalone or to expand the PowerCube Extended or Extended USB. In addition to 4 power outlets, the PowerCube Original USB also provides a Dual USB-port. This powered USB port enables the user to charge a cell phone, camera, MP3-player, GPS, etc… * Dual-USB Charging - The PowerCube |Original USB| comes with dual powered USB-A ports (2.1A) that are compatible with your smartphones and tablets. No additional adapter needed. * No Plug Blockage - Are those bulky laptop plugs getting in the way of the other power outlets? The PowerCube |Original| is perfectly suited to neatly plug in all your devices. * Socket Multiplier - Need more power outlets in your room or office? Plug the PowerCube |Original| into one wall socket and power all your devices with 5 socket outlets. * Space Saving Design - Perfectly sized for any wall outlet in your living room, office, classroom, and bedroom. Connect up to 5 devices at once in all directions with this neat little cube. * Stack to personalize it - Stack your PowerCubes to create your desired number of sockets. Just stack, plug, and power! Have fun creating your own tailored source of power. * Childproof Sockets - Spring-loaded receptacle cover plates prevent the insertion of objects when unequal pressure is applied. Align the prongs to plug into the sockets. Keep your child safe with our childproof shutters.