This module has advanced quality...
5 V 5000 ma Stabilized Power Supply
5 V 1000 ma Stabilized Power Supply
5V 2000ma Stabilized Power Supply with 5.5x2.1mm Jack
Source 5V switching regulator 10A (50W)
5V 40A (200 W) Switched Mode Power Supply
AC - DC AC power supply with 230V AC power supply providing a stable 5V DC output voltage at a maximum current of 4A.