Specification: Input: AC 100 - 240V, 50 / 60Hz ; Output: DC 12V, 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. Compatible: 5050 3528 12V LED Strip Light, Wireless Router, ADSL Cats, HUB, Security Cameras, Audio/ Video Power Supply, 3D Printer, LED Driver, CCTV Security System, LCD Monitor, Webcam Router and other 12V devices with jack size of 5.5mm x 2.5mm.