Philips DVT1100 Digital voice recorder Voice-activated recording is a convenience feature for hands-free recording. When enabled, recording will start automatically when you start speaking. Recording stop automatically after you stop speaking & restart automatically when you start speaking again. Press & hold the record button for a moment to switch the recorder on & start recording instantly. Thanks to time-stamped recording, the date & time of your recordings are added to the sound file, allowing you to easily find & navigate through your file library. Just plug your recorder into your PC & play in Windows & Mac OS. With the 4 GB of built-in memory, your recorder is able to capture multiple days of continuous recording. The batteries of the new recorder last for up to 42 hours for extra long recording sessions.