Input: 100V-240V 50/60Hz; output: 12V DC, 2A max; Works with device that draws less than 2A, such as 1.1A, 1.2A, 1.4A, 1.5A, 1.8A, 2A. Pack of 2. DC plug connector external diameter is 5.5mm, internal diameter is 2.1~2.5mm. Comes with a female DC barrel connector. You can easily screw wires on it without soldering. Safety protection: automatically overload cut-off, over voltage cut-off, over temperature cut-off, short-circuit cut-off. Sufficient 24W output power and stable 12V output voltage will protect your electronic devices from destruction. It is perfect for 12V devices less than 24W, such as LED light strip, CCTV camera security system, Bluetooth speaker, keyboard, TV boxes, webcam router, etc.