Panasonic RQ-250 cassette recorder. It uses two AA batteries. I was able to play a 90-minute cassette tape I had. Audio recording also worked. I also confirmed the microphone, pause, sound quality adjustment, and rewind functions. As a bonus, I'll include the cassette tape in the photo that I bought to try out (please note that the outer vinyl packaging has been used). There is a black bag to put the recorder in (with scratches). It's nostalgic, and some people might call it elegant. I think it would be good for creating conversation. I think it will become valuable in the future. I cannot guarantee all functions. Please check the condition in the photos. There is a crack in the lid (last photo). You may want to reinforce it with cellophane tape from the back. It's an old item, so it's sold as-is. Please understand and consider purchasing. Popular word... Cartridge