This is an M-stage music, a dedicated music distribution terminal for PHS released by NTT DoCoMo. Purchased around 2001. Used for about 2 years at the time of purchase, and then stored at home. There is damage inside the screen. It powers on when connected to the AC adapter, and the LCD screen can be operated, but the internal battery is likely dead as it's been over 20 years. This is an old item, so please consider it as junk. - Model: P711m - Brand: Picwalk - Accessories: Main unit, SD card (64GB), Panasonic earphones, DoCoMo AC adapter (P003) - Color: Black Thank you.