Sony Digital Paper, which reads and writes like paper. Compact A5 size. Digital Paper DPT-CP1 ・The DPT-CP1 can only view and write on PDF files. ・The DPT-CP1 does not have applications for purchasing content from e-book-only sites such as the Reader Store. Also, you cannot read e-books purchased from the Reader Store etc. on the DPT-CP1. ・The "Digital Paper App" is required to transfer documents between your computer and the DPT-CP1. ・Depending on the settings of your computer's usage environment (security software/firewall, etc.), the computer and DPT-CP1 may not be able to connect. - Model Name: DIGITAL PAPER - Accessories: USB cable, pen, 13 replacement pen tips - Color: Gray - Size: A5 size I purchased this previously and used it a few times, then stored it at home. The condition is clean, but the pen seems to run out of battery quickly, and it wouldn't work stably unless the USB cable was plugged into the pen for charging. (It might be usable if you review the charging time and settings) Thank you for viewing.