The Olympus DS-2500 Digital Voice Recorder is a reliable device that can record almost anything important, including lectures and minutes of meetings, with utmost clarity. It has a cardioid polar pattern that captures sounds from the front and cancels all other ambient sounds. The recorder’s mono microphone has a frequency response of 200 to 7000 Hz. You may activate audio recording with just your voice. The recorder can continuously operate for 303 hours in SP mono and 148 hours in QP mono modes. The built-in 250 mW speaker can be used for reviewing the recording. The DS-2500 comes with a DSS Player software, so you can save the audio files in the high-compression DSS (DS2) format. You may monitor the battery status, audio recording, and sound peaking with the help of the 1.74-inch backlit LCD. The audio recorder supports SD cards of up to 32 GB and is compatible with Windows and Macintosh operating systems.