The Olympus Ws-852 4GB digital voice recorder can record up to 1,000 hours of stunning high-quality sound with the True Stereo Mic system. Positioned at a 90-degree layout, the two directional microphones record sound with excellent precision. The recorder will automatically adjust the microphone sensitivity to accurately capture the precise volume of the speaker. This digital voice recorder can operate for more than 100 hours before requiring another battery charge.