How do I use the USB ports on the FatMax PP1DCS?

Press the USB Power Button to turn on all four USB ports. The USB Power/Fault Indicators will light blue and the LCD screen will display the USB Icon. Plug your USB-powered device into any port and operate normally. The top two ports provide 3.1A total and the bottom two ports provide 3.1A total. Press the USB Power Button again to turn off the ports. (Page 14)