This charger is designed for devices with power requirements up to 65W(45W 33W included). It is not compatible with laptops requiring more than 65W, such as gaming laptops. Certified Safety -- Certified and listed by the nationally recognized electronics safety expert UL. Only products with the top quality, workmanship & safety level in the industry can pass the extremely stringent quality tests to obtain this honorable certification. IMPORTANT: Only Fit for 4.0*1.35mm - Please check our images to confirm the compatible size. Flawless Compatibility -- Switchable round connectors designed exclusively for vivobook 14 15 17 series, with 65W, 45W, or 33W round power connectors. Other Specs -- Output: 19V 3.42A-65W 2.37A-45W 1.75A-33W, Input:100-240V.