Onekey recording and saving. This device is designed for simple, reliable operation: press to start recording, press to save, and it saves automatically before poweroff to preserve your data. Autosave when power is off. If the system detects a low battery, it automatically saves the current recording and powers down to prevent data loss. Up to 25 hours of uninterrupted recording. Builtin energy polymer lithium battery and an intelligent energysaving system enable longterm use in a compact, smallsize unit. Local playback. You can listen to recordings or music on the go, making it convenient for spare time listening and travel. Key attributes. Builtin polymer lithium battery, compact size, energysaving design, reliable onekey control, and local playback of recordings. Use scenarios Business travel and meetings: discreetly record discussions for accurate notes without distraction. Lectures or classes: capture talks for later review and study, portable enough to carry on campus or to seminars. Everyday carry and travel: use as a keychain companion to listen to saved recordings or music during breaks and commutes.