This is a genuine and original LENOVO ADP-40NH B 20V 2A 40W AC power adapter charger. It is compatible with LENOVO laptops and is designed to provide a reliable and efficient charging experience. The unit type is a unit and the output watt(s) is 40W, while the voltage is 20V and the output amp(s) is 2A. The unit quantity is 1 and it is compatible with the ADP-40NH B model. This black AC/DC adapter is perfect for those who need a replacement or an extra charger for their LENOVO laptop. It is compatible with the ADP-40NH B model and is designed to provide the same level of performance as the original LENOVO charger. This adapter is ideal for those who want to keep a spare charger at home or in the office.