Designed for portable use in the field with DSLR cameras: tripod plate attaches to bottom; DSLR type camera attaches to top surface. The unit records pristine sound in 2 or 4 track combinations; outputs pristine sound at mic or line levels, but only as stereo mini outputs (meaning don't send your tracks 3/4 to outputs if you want separated sources on your camera). Mostly used in a "double audio system" situation in a video production. Great for podcast recording. Battery and A/C operation. The only blemish on this unit is that some of the printed logo on the back of the unit is worn away. Records internally to an SD card.