Different environments require different audio settings for an optimal recording quality. AutoAdjust+ analyses the audio signal and chooses the perfect settings for the recording situation. The result is crystal clear recordings. MP3 recording for clear playback and easy file sharing. Compatible with Windows 8/7/Vista, Mac OS X, Linux. LCD. Built-in memory 4 GB. Voice activated. Recording time 50 hours. 5 recording qualities. Stereo voice recorder. Dictation and conference recording modes. Slow_fast playback. A to B repeat function. 5 folders. Built-in microphone. Built-in microphone and speaker. Integrated speaker. Can be used as an MP3 player. WMA files can be transferred and played. Built-in USB connector. USB cable, Windows 8/7/Vista, Mac OS X, Linux, microphone, headphones and headphones and microphone. General information: Weight 83g. Size H12.1, W4.4, D1.8cm. Rechargeable.