This power supply unit is designed for Dell laptops and compatible with models that require 70 watts of power. The black color and sleek design make it a great addition to any workspace. It has a voltage compatibility of 100-240V and can work with input power of 50-60Hz. The model number of this power supply unit is DELL PA-4 and the part number is PN:1243C. The power supply unit is perfect for those who need a reliable source of power for their Dell laptops. It is easy to install and use, and comes with all the necessary cables and connectors. With this power supply unit, you can be sure that your laptop will always be charged and ready to go.