Voice-activation function for hands-free recording. MP3 recording is the common audio for consumer audio storage. ClearVoice adjusts quiet passages dynamically, thus improving the intelligibility of quieter voices. Rapidly transfer recordings and data via USB 2.0. Instant 1-touch recording-press and hold the record button to instantly start recording. Supports up to 99 recordings in each of 4 available folders to organize your files. Plug-and-play in Windows, Mac OS and Linux. Lightweight and ergonomic design. Built-in round dynamic front speaker for crystal-clear voice playback. Hold function deactivates all buttons to prevent accidental key presses. Recording time: 544 hours (SLP), 140 hours (LP), 92 hours (SP), 70 hours (HQ). Requires 1 AAA battery (included). Includes USB cable