Automatic save on poweroff: When the system detects low battery, the device automatically saves the current recording and then shuts down to prevent data loss. Onekey recording and saving: Easy operation for users. Press to start recording, press again to save, ensuring the recording is saved before poweroff. Local playback and music: It can be used not only as a voice recorder but also as a keychain. You can listen to music in your spare time, making it suitable for travel and business trips. Long battery life in a compact design: 25 hours of uninterrupted recording with a builtin energy polymer lithium battery and an intelligent energysaving system. The device remains small while providing extended recording capability. Practical use scenarios: On business trips or in meetings to capture notes and conversations with automatic save to prevent data loss. During travel or commutes to listen to music and take quick recordings when needed. In lectures or classes to record content and playback later for study or review. Key attributes: Function: automatic save on low battery, onekey recording and saving, local playback. Material/Power: builtin energy polymer lithium battery with an intelligent energysaving system. Size and portability: compact form factor suitable to carry as a keychain or everyday carry.