This kind of 4 in 1 type QC3.0 desktop type quick charger the specifications as bellow:
Input:120-240V AC 50/60Hz;
Output: normal 3 usb, 5V 4A; the QC3.0 port 3.6-6V 3A/6-9V 2A/9-12V 1.5A, Max current can reach 3A; total 5V 7A;
This type we have got the CE,rohs,FCC,Qualcomm and SAA certificate.
The pictures as bellow shown: