1. This software was purchased over 30 years ago. 2. Please note that the operation has not been checked. 3. The button battery has not been replaced by disassembly, and is in its current state. 4. There are no instructions or case. 5. We will carefully package the item for shipping. As this is an old item from over 30 years ago, we would appreciate it if you could examine the photos carefully before considering a purchase. Please refrain from purchasing if you are overly concerned about details or seek a perfect item. Please understand that this is a used item, and only those who can accept this are kindly requested to purchase it.