Key features and benefits Onepiece shell provides strong drop protection, enhancing durability in everyday use and on the go. Automatic timestamping and datebased file naming for recordings, keeping files organized and easy to locate. Lowbattery detection saves recording files automatically before power off, reducing the risk of data loss. Multifunction device that acts as a voice recorder, MP3 player, and USB drive; supports quick access to saved audio and files. Onekey recording with a dedicated save action for fast, reliable capture. Realtime monitoring of recordings and a hearing aid function for immediate audio feedback and assistance. Use scenarios Meetings, lectures, and interviews Capture discussions and notes with automatic datebased file naming and autosave on low battery, while monitoring in real time to ensure important moments are recorded. Fieldwork and onthespot reporting Record clear audio during inperson interviews or onsite observations; use the onekey recording feature for quick capture and immediate accessibility later. use and portable media Use as an MP3 player and USB drive for music, podcasts, and file transfer, providing versatile and convenient access to audio and data. Productspecific notes Functions as a voice recorder, MP3 player, and USB drive on a single device. Realtime monitoring supports immediate audio checks during recording. Hearing aid function provides additional audio assistance where applicable.