Features: This voice recorder has Large internal memory, also be used as a USB storage device, you can copy and store the required data for easy use IP67 Waterproof, 3200mAh large capacity battery, charging time only needs 6-7 hours. When fully charged, the battery can continuously record for about 15 days(360-500 hours) Built-in magnet, powerful magnetic attraction ability is easy to be attached to the iron surface, making recording easy.  There is a file inside the voice recorder that can be used to synchronize the date and time of the computer. All recorded files are named with the recording date and time, which is convenient for daily management.  Easy File Management: key switch/save. Continuous recording/ voice activated recording, two recording modes can be operated freely. Just switch the "VOR" button to select the voice control mode to avoid too many blank files occupying memory.  Great for recording meetings, classes, lectures, interviews and any important voice conversations.  Internal Memory: 8GB/16GB;  3200mAh Battery: Compatible: for Mac/ Windows;  Audio Format: MP3 & WAV;  Recording time: About 500 hours(with 192KBPS);  Battery Life: About 15days of recording;  Dimensions: 77 x 22 x 25mm;     Package Included: 1 x Voice Recorder;  1 x User Manual;  1 x Data Cable