PC+MAC Compatible. The click on zoom microphone"s unidirectional functions suppresses surrounding noise & zooms in to capture voices far away. Included remote control operates functions such as start/stop recording, index marking & opening new recordings.Featuring 4GB flash memory, this records up to 573 hours of data in 3 common MP3 mono (SP, LP, SLP) & 3 stereo formats (SHQ, HQ, PCM-CD quality). This allows for a higher sampling rate & clearer recordings. Files are organized in 4 folders (99 files/folder) for easy retrieval & can be downloaded to PC via USB 2.0.The USB can power the device during long recordings without draining the battery. With MP3/WMA music playback, FM radio tuner & customizable equalizer, play favorite tunes. Functioning as a USB, any type of file can be stored & shared on the device.Features clean buttons for ease of use & the largest display in the market to view all relevant information at a glance.The adjustable microphone sensitivity is perfect for both foreground & background recording. The large front speaker (30 mm) reproduces stunning quality playback.The voice activated recording option automatically records only when sound is detected, & the index mark feature lets you mark a particular point in a recording or playback for easy retrieval. Recording monitor can be used to listen to the recording through headphones to ensure adequate record level.Other features include the ability to insert the date/time within file & the timer recording feature programs recordings in advance.File split/auto divide feature splits recordings into separate files making them easier to find, edit & archive.The alarm feature schedules voice alarms.Other features include slow & fast playback, LED record/playback, battery & end of memory indicators.Includes an external stereo lapel microphone, stereo earphones, neck strap, USB cable, click on zoom microphone, remote control, carrying case, 2 rechargeable batteries "AAA" & user manual.