120V to 12V CONVERTER: input voltage AC100-240V US plug, DC12V 2A/2000mA output, work with device that less than 2A, such as 0.5A, 1A, 1.2A, 1.4A, 1.5A, 1.8A WIDELY USED: 12V LED strip lights, router, ADSL Cats, surveillance cameras, external HDD, 3D Printer, webcam router, keyboard, LCD monitor, digital piano, portable Keyboard, speaker and other electrical supplies less than 12vdc 2 amps 24W 4FT POWER CORD with 5.5 x 2.1mm DC JACK: DC plug connector external diameter is 5.5mm, internal diameter is 2.1mm, central positive(+), outer negative(-), pls check your device output and plug size before purchasing to ensure the adapter's plug fits your devices EASY TO USE: especially add a female DC barrel connector, you can easily screw wires on it without soldering HIGH QUALITY: full protection of over voltage, over current, short circuits and over temperature