Compact, digital voice recorder captures and stores audio with a built-in 2GB flash memory that provides up to 750 hours of recording time, plus additional storage available through the microSD memory card slot. Memory card is sold separately. With Intelligent Noise Cut technology greatly reducing background sound, your recordings will be crisp and clear in quality. Voice recorder also includes Sound Organizer software for easy audio editing, CD/DVD burning and other useful applications. Other features include voice-operated recording technology, a built-in speaker, easy-to-read backlit display, four modes, five message folders, safety lock (hold), cue, review, easy search and erase/protect. The ICD-PX312 runs on two AAA batteries and includes a mini headphone jack, mini microphone jack and Mini-B USB port.