While the PS3-METERC3's defining feature may be it's USB-C charging and display, it also functions as a full blown power strip, supporting 1250W of power to be output via the 3x AC outlets. Because of this, the power cord needs to be heavy duty, and support a wire gauge that can handle up to 1250W of power. This thickness of cable is common on most power strips, and it is to ensure safety and full functionality when high power devices are connected.