Professional Voice Recorder- The recorder has perfect recording quality and real stereo experience. Advanced chips and noise reduction allow you to enjoy crystal high-definition recording and playback during classes, lectures, conferences, speeches, interviews, and evidence collection.[1160 hours of long-time recording]-This recorder's large-capacity rechargeable 3800mAh battery can stand by for up to 365 days, and can record continuously for about 300 hours after each full charge; the password lock also makes your recorder a safe and secret guardian (Set on the computer).[Mini and easy-to-use recorder]-This mini recorder is light and portable, convenient and easy to put in your pocket or palm; very easy to use, press the "on" button to save, and press the "off" button to save. Audio sound activation can record loud enough sound when sound is detected.Strong magnetic tape recorder- Strong magnetic tape can be affixed anywhere, under the bed, under the desk, and in the car seat, making recording easy and secret; stimulation can reduce noise; the recording sound is clear.[Important Reminder] Please update the date and time on the computer before using it for the first time (set the time stamp) If you cannot play the recording (WAV format), please download/use a player that supports playing WAV format files.