[Smart Voice Recording]: Support voice control recording, record when there is a sound, and automatically pause when mute, effectively saving storage space, filtering invalid clips, and reducing playback time consumption.[High-definition noise reduction technology]: Using DSP professional recording chip, high-definition noise reduction, to ensure that the same as your ears, restore the real scene.[Long time recording]: Fully charged for 6 hours. The recording time is about 500 hours, the playback time is about 220 hours, and the bit rate is 192KBPS. The longest standby time is 365 days. Ideal for meetings, conferences, interviews, lectures, and lessons.[OTG function]: You can use the OTG converter to transfer the recording files to the mobile phone, making work and study more convenient and faster.[Strong magnetic function]: It is small in size and can be attached to any place that can be adsorbed, which is very convenient.