This genuine Dell 180W AC adapter is compatible with a variety of Dell Precision laptops, including the OptiPlex 7090 Micro, Optiplex 7000 Tower, and Alienware M15 R4, M17 R2, and R3 models. With a voltage of 19.5V and output current of 9.23A, this black adapter is perfect for powering your laptop or desktop PC. This adapter is part of the Dell Series and is an AC/Standard type. It is a great addition to your laptop accessories and a must-have for anyone who needs a replacement adapter.