Take the hassle out of transferring media with the Advent CR312 USB (Universal Serial Bus) 2.0 Memory Card Reader. Transfer with ease This memory card reader has 4 slots & is compatible with a range of memory cards, including SD, SDHC & MMC memory cards. You won't have to connect your device to your PC when you use the CR-312, as you simply put your memory card into the reader. USB (Universal Serial Bus) connection Thanks to the USB (Universal Serial Bus) connection you can simply plug your CR312 USB (Universal Serial Bus) Memory Card Reader into your PC & start transferring, with fast data transfer speeds. It is compatible with Windows, Linux & Mac operating systems, & as it is USB (Universal Serial Bus) powered you don't need to carry an extra power supply. Make data transfers simple with the Advent CR312 USB (Universal Serial Bus) 2.0 Memory Card Reader.