About this item 65W Power Output Input: 100-240V ~1.5A, 50/60Hz; Output: 20V 3.25A, 65W. Connector size: 7.9mm x 5.5mm with center pin. Please verify your original adapter and port before purchase. Strict Compatibility with Round Tip Models Designed for laptops using the 7.9mm round tip, including ThinkPad T420, T430, T520, T530, X220, X230, X230t, L420, L430, E430, E530, SL410, SL510, and S230u. Premium Safety Features Built-in protection against over-voltage (OV), over-current (OC), short-circuit (SC), and internal overheating (IO). Ensures stable charging and device safety. Certified Quality Manufactured with high-quality materials and certified by CE, FCC, and RoHS. Designed to meet international safety and environmental standards. Dimensions: 7.4 x 5 x 1.85 inches.