Automatic date stamping and energy secure save: Recodings are named by date automatically and the device automatically saves the current file before power off when the battery is low. Allinone recording and playback: Functions as a voice recorder, MP3 player, and USB drive. Onekey recording and onekey save for quick, hassle operation. Durable, userfriendly design: Onepiece shell provides strong antifall protection and reliable handling in everyday use. Compact and portable for pocket or bag use. Realtime monitoring and hearing aid support: Monitor the recording in real time and access hearing aid function for assisted listening in various environments. Easy file transfer and compatibility: Works as a USB drive for straightforward file transfer to a PC; supports convenient MP3 playback on the device. Use scenarios In lectures or meetings: Capture notes and discussions with datestamped filenames and automatic save to prevent data loss when power is low. In the field or during interviews: Record quality audio on the go, save with a single press, and transfer files to a computer later using the USB drive function. For listening and listening support: Use as an MP3 player and leverage the realtime monitoring and hearing aid function to enhance listening in busy environments.