Realtime monitoring and hearing aid function Monitor the recording in real time and enjoy a hearing aid function for immediate audio feedback Multifunction device Works as a voice recorder, MP3 player, and USB drive One key to start recording and to save audio quickly Intelligent file management Timestamped recordings with automatic datebased file naming Detects low battery and saves recording files automatically before power off Durable design Onepiece shell for strong antifall protection and durable performance Use scenarios In meetings or lectures: capture discussions with realtime monitoring for accurate notes On the go: use as a portable MP3 player and USB drive for audio playback and data transfer Field recording or interviews: rely on automatic save before power off to prevent data loss when battery is low Performance and compatibility Reliable voice recording and MP3 playback in a compact form Functions as a USB drive for easy data transfer and storage Designed for durability with a rugged onepiece shell for everyday use