Dane-Elec zMate USB MP3 Player with SD-MMC Slot (White) Dane-Elec zMate USB MP3 Player w/SD-MMC Slot General Features: White design Plays MP3 music formats USB1.1 interface SD/MMC card slot (card not included) Supports up to 2 GB memory Headphone jack A-B button Lock button No internal memory Operates on one (1) AAA battery (not included) Unit Dimensions: 2.75 x 1.75 x 0.5-inches (H x W x D, approximate)