•Output: DC 21V, Max 5A, 60W ; It can supply with all amperage less than 5A. ---such as 500mA, 800mA, 1A, 2.5A, 5A. If your device draws 3A then 3A will be supplied. But if draws more than 5A, only 5A will be supplied and power supply will be damaged soon. NEVER OVERLOAD!
•Output DC adaptor jack size is 5.5mm x 2.5mm.