I've got the same WS-500M that zxcvbob mentioned earlier although I haven't used it in many years. It's a great recorder; records in stereo, records in .wav or .mp3, uses a regular AAA battery, has a built-in retractable USB connector, has headphone and microphone jacks, and the fidelity is good. That particular model has limited storage, although I don't remember how much. Navigating the menus is a little tedious, but probably not any worse than others and easy to use. I'm sure the newer models have larger capacity, you might want to check them out.