We have around 75 of these Desktop 10 Port 6 Slot 96Watt USB Charging stations with built in power supply. 

8 x 5v 2.1A USB charging ports plus 2 x 5V 1.2A Ports

Inside the unit is a FJ-SW1208000F Switching Adaptor Power Supply 12V 8000mA output 100-240V input. Can sell separately