Portable Digital Recorder Built-in Stereo Electret Condenser Microphone Records to SD or SD-HC Card Media 2GB SD Card Included USB 2.0 Jack for Transferring Files 3.5mm Stereo Mic Input 3.5mm Stereo Line Input and Output Switchable Low Cut Filter, Analog Limiter and Auto Gain Setting on Input Writes WAV files at 44.1 or 48kHz, 16 or 24-bit MP3 File Recording from 32kbps to 320 kbps Variable-Speed Audition Function Slows Down Music Without Changing the Pitch Powered by Two AA Batteries (included) or Optional PS-P520 Power Adapter Dimensions: 2.2" W x 5.3" H x 1.1" H Weight: 4.4 oz (with batteries)