Voicecontrolled recording Audio recording with voice control; silent automatic sleep mode to improve efficiency and conserve memory and power. Onebutton recording for simple operation. definition recording Employs an advanced thirdgeneration recording main control chip; equipped with a quality noise reduction algorithm that reduces environmental noise for clearer, more natural sound. Multifunction recording Poweron recording; up to 50meter longdistance recording; poweroff protection; timestamp; ultralong standby; timestamp memory; noise elimination; MP3 player; USB drive (U disk) use; etc. Multipurpose design Functions as a recorder, MP3 player, and USB drive; key multifunction buckle; attractive appearance; no light emission and silent operation; recording anytime and anywhere; suitable for work, study, etc.; especially useful for evidence collection; discreet and compact, with a significant practical impact.