The Secure Digital (SD) flash card pen style reader/writer has a compact & streamlined design with a USB (Universal Serial Bus) cap at one end & a flip top cap for access to the card slot at the other. This reader has an LED power indicator & is compliant to USB (Universal Serial Bus) 2.0 Supports: Secure Digital (SD) Card SDHC Mini SD* Micro SD* Multi Media Card (MMC) RS-MMC * MMC Mobile* * requires adapter Dimension 75 x 30 x 10 mm (LWH) System WIN 2000.XP Mac OS 8.6 & above Please Note: Memory Card shown Not included.