Professional recorder phone recording function, MP3 player can be played externally, compact and portable, can record or can be used as a U disk to use USB direct plug without data cable, AB repeat, this machine has a delete function, with internal recording function, continuous recording time can reach up to one time 10 hours; pure metal shell, is a multi-functional recording pen used in meetings, classrooms, lectures, learning and other occasions. Recording time: Super High Quality (192 kbps) : 2760 minutes. High Quality (128 kbps) : 3840 minutes. Short Play (64 kbps) : 8460 minutes. Long Play (32 kbps) : 16560 minutes. Voice Operated Recording (VOR). 7 EQ modes. A-B repeat function. MP3 function. Different languages. Delete function. USB connection, for uploads and downloads. Built-in speaker Built-in rechargeable lithium battery. Battery life expectancy: Up to 20 hours continuous recording. Up to 13 hours continuous playback.