With perfect recording quality and true 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. [2400 Hours Long Time Recording] - The large-capacity rechargeable 3200mAh battery of this voice recorder allows up to 365 of standby time, and more than 300 hours of continuous recording after each full charge; 32GB memory can store up to 2400 32kbps hours in total Recording files. A combination lock also makes your recorder a security guard (set on your computer). Mini Easy-to-Use Activation Voice Recorder- This mini voice recorder is lightweight and portable, convenient and easy to put in your pocket or palm; Activated o sound can record loud enough sound when sound is detected. Strong Magnetic Suction Recorder-Strong magnetic suction can be adsorbed anywhere, under the bed, under the desk, under the car seat, easy and secret recording; stimulation can reduce noise; the recording sound is clear.