Full Details from Amazon.com : http://www.amazon.com/gp/product/B00005JGD4?tag=onigi-20<br /><br />Hewlett Packard 82216A 1 MB RAM Card for the HP 48GX<br /><br />1 MB RAM memory card <br />Compatible only with the HP 48gx calculator <br />Powered by its own long-lasting battery <br />Independent memory only <br />A quality HP product
