Universal Micro SD Card Reader and Writer Blue NEW. Retail Packaged MicroSD Card Reader and Writer can read and erase the Micro SD flash card time after time. You can see and edit your pictures on the reader directly without adapter. You will be able to exchange data between computer and MP3, PDA, digital cameras, and mobile phones. The power supply that the reader needs is provided by the USB port, therefore, no need for external power. It is also mini and portable, making it easy to take with you. It has a cord hook metal latch that can attach to you keychain ring or other misc. Compatible with Windows and Mac OS operating systems.