Up to 1,000 hours of recording time. Records in PCM, MP3 and WMA formats. 5 acoustic scenarios for optimized recording quality. Voice activated. Built-in stereo microphone and speaker. Ports for external microphone and headphones. Built-in 4 GB memory. Can save music, voice memos, still images, etc. Works as a mass storage device and music player. 1.43" backlit screen. USB port for easy connection/data transfer to a computer. Comes with a rechargeable NiMH AAA/LR03 battery (charged in the device). Size: 100x41x15 mm.