12V 5A 60W Switching Power Supply
It can supply with all currents less than 5A, such as 1A, 1.5A, 2A, 2.5A, 3A, 3.5A, 4A, 4.5A, 5A. For example, if your device draws 3.8A, then 3.8A will be supplied.
If draws more than 5A, only 5A will be supplied and power supply will be damaged soon. NEVER OVERLOAD !