General information. Input Voltage: AC 100V-240V 50/60Hz, Output: 12V DC 5A Max. Works with device that draws less than 5A, such as 500mA, 800mA, 1A, 1.5A 2A ,2.5A, 3A,3.5A, 4A, 5A; DC plug connector external diameter is 5.5mm, internal diameter is 2.1~2.5mm; with a female DC barrel connector, You can easily screw wires on it without soldering. Safety Protection. The power adapter has automatic overload cut-off, over voltage cut-off, over current cut-off, overheating protection, short circuit protection function. The protection technology will help to protect your equipment. No noise, no spontaneous combustion, no explosion, no fire hazard, safe to use.