Professional Audio Recorder- The audio recorder has perfect recording quality and real stereo experience. The advanced chip and noise reduction function allow you to enjoy crystal clear high-definition recording and playback in classrooms, lectures, conferences, speeches, interviews, forensics and other occasions. 1160 Hours Long Time Recording- The large-capacity rechargeable 3800mAh battery of this voice recorder allows up to 365 days of standby time, about 300 hours of continuous recording after each full charge; 16GB memory can store up to 1160 hours in total at 32kbps recording files. Password lock also makes your recorder a safe and secure keeper (set up on your computer). Mini and Easy-to-Use Activated Voice Recorder- This mini voice recorder is lightweight and portable, convenient and easy to put in your pocket or palm; very easy to use, press the "on" button to save, press the "off" button to save. Activated audio sound can record loud enough sound when sound is detected. Strong Magnetic Suction Recorder-Strong magnetic suction can be attached to any place, under the bed, desk, car seat, easy and secret recording; stimulation can reduce noise; recording sound is clear.