This product is either discontinued or we cannot get that from suppliers.
Startech 4-port USB4PACBK, Input Current 0.9A, Input Voltage 100 - 240 AC, Output Current 6.8A, Output Voltage 5 DC, Black, Included 1 - 4-port USB wall charger, 1 - Universal Power Adapter (NA/UK/EU/AUS).
This 4-port charger lets you keep all of your mobile devices charged and ready to use, regardless of where you’re located. Whether you’re at home, in the office or travelling overseas, you can charge up to four devices at once.