Premium Metal BodyExquisite metal casing, scratch-resistant, durable and comfortable hand feeling for business use.MP3 Audio Format SupportedSupports standard MP3 recording format, easy to play and share on various devices.Smart Voice ActivationAuto starts recording when sound detected, auto pauses in silence to save battery and memory.Long Life BatteryHigh-capacity built-in battery, provides ultra-long continuous recording and standby time.USB Recording & TransferUSB plug-and-play design, supports direct recording and fast file transmission, convenient for office work.