Connections: Two 1/4" unbalanced mic/line inputs Switchable guitar input Headphone/Line output USB 2.0 connector Recording: Four-track digital multitrack recording CD-quality 44.1kHz/16-bit WAV recording Records to SD Card media (1GB card included) Repeat, Record undo Dedicated stereo mixdown track Physical: Powered through AA Batteries or optional PS-P520 power adapter Battery life: About 8 hours recording, about 8.5 hours playback (alkaline batteries) Dimensions: 6.1" W x 1.3" H x 4.2" D (155mm W x 33.5mm H x 107mm D) Weight: 2.8 oz (360 g, w/o batteries)