Automatic voice recording device, DC5V power supply, with RJ-45 terminal. I bought it for my grandparents, but the phone itself now has a recording function, so I'm selling it. Sold as is. No claims accepted. - Model Name: YDR-100A(TW) - Power Supply: DC5V 4W - Country of Manufacture: China - Connection Terminals: AC adapter terminal, two RJ-45 terminals Please see the website for the manual. Thank you for looking.