DC PLUG SIZE: The DC plug on the 12V 2A Power Supply Charger measures 5.5mm x 2.1mm. Additionally, it comes with 8 other DC Plugs: 5.5x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 6.4x4.4mm, and an LED terminal connector. This wide variety of plug options significantly expands the adapter's range of applications. Before making a purchase and using it, please double-check the DC jack size to ensure compatibility. INPUT & OUTPUT: 12V 2A Power Supply: Accepts Input: AC 100~240V, 50/60Hz; Delivers Output: DC 12V 2A, providing a maximum of 24W. With a maximum output of 2000mA, it can accommodate a wide range of amperages, including 12V 2A, 1A, 1.5A, 0.8A, 0.5A, 2000mA, 1200mA, 1000mA, 700mA, 600mA, 500mA, 400mA, 300mA, 200mA, and 100mA, among others.