Initial operation confirmed. The backup battery is not guaranteed. Software only. The software has scratches, damage, and dirt. Box and instruction manual are missing. It may not start up on the first try depending on compatibility with the main unit; in that case, please clean the terminals, etc. The main unit used for operation confirmation is not included. Please purchase if you understand that this is a used item. We do not offer price reductions. Instant purchase is okay. 0602