Casio AC Adapter AD-2S DC3V 150mA Center Negative This is an AC adapter for Casio calculators. I do not know the compatible models, so please check for yourself before purchasing. I found this after it had been stored in a closet for a long time, so I am putting it up for sale. I have confirmed that it is working with a tester. Also, for shipping, I plan to use Yu-Packet Post Mini. Therefore, after taking the product out, I will pack the product and fold the box it came in for shipping, so please be aware of this. The box is quite worn from age, but the product inside is unused, so thank you for your understanding.