Adafruit MicroSD Card Breakout Board+ [ADA254]
Brand: Adafruit

Not just a simple breakout board, this microSD adapter goes the extra mile - designed for ease of use. Onboard 5v->3v regulator provides 150mA for power-hungry cards 3v level shifting means you can use this with ease on either 3v or 5v systems Uses a proper level shifting chip, not resistors: less problems, and faster read/write access Use 3 or 4 digital pins to read and write 2Gb+ of storage! Activity LED lights up when the SD card is being read or written Four #2 mounting holes Push-push socket with card slightly over the edge of the PCB so its easy to insert and remove Comes with 0.1" header (unattached) so you can get it on a breadboard or use wires - your choice Tested and assembled here at the Adafruit factory Works great with Arduino, with tons of example code and wiring diagrams