The RFID USB Reader is a simple to use, USB to serial base unit for the ID-2, ID-12, and ID-20 readers. Simply plug a reader into the headers and attach a miniUSB cable. Open a terminal program of your choice at 9600bps 8N1, then scan your 125kHz ID tag and the unique 32-bit ID will be shown on the screen. The unit is based on a FTDI chip and comes with a read LED and buzzer. This product does not come with the RFID reader. ID Readers are listed below. 1.4x1.2x0.57" Project description, more information and ordering can be found at https://www.sparkfun.com/products/8852 USB FTDI Drivers for Linux, MAC, and PC: http://www.ftdichip.com/FTDrivers.htm