This is a genuine Lenovo 135W 20V 6.75A AC adaptor charger, compatible with Lenovo laptops T440p, T530, T540p, and W540. It is designed for use with these laptops and will provide the necessary power to keep them running smoothly. The adaptor is made by Lenovo and is designed to meet the highest standards of quality and reliability.With this adaptor, you can be sure that your laptop will have the power it needs to run efficiently. It is a great replacement for your old or damaged adaptor, and will provide you with a reliable source of power for your Lenovo laptop.