Upgrade your calculator game with this Royal Business Machines Calculator 20PD & 90PD Plug In Power Supply Model 6300N. This AC/DC Adapter comes in a sleek black color with a 4 ft cable length, making it convenient for any workspace. The powered feature ensures a reliable and efficient flow of energy, while the output voltage of 6V provides just the right amount of power needed for your calculator to function smoothly. As a bonus, this adapter is compatible with both the 20PD and 90PD calculator models. Get the most out of your calculator with this top-quality adapter.