This Casio 32KB Digital Diary SF-4300A Calculator Electronic Organizer has been tested and is in good working order. It is a vintage item that will add a touch of nostalgia to any collection. The calculator has a storage capacity of 32KB and includes various features for organizing daily tasks. The Casio brand is known for its quality products, and this digital diary is no exception. It is a great item for collectors or anyone who appreciates vintage electronics.