Simplecom CR303 2 Slot SuperSpeed USB 3.0 Card Reader with Dual Caps CR303 USB3.0 2-Slot Card Reader offers a compact solution to access and protect the most popular memory cards, including SD, SDHC, SDXC, and Micro SD/SDHC/SDXC. Easily transfer files from your memory cards to your computer at USB3.0 speed up to 5Gbps. Also, CR303 with dual caps design, you can use it as an enclosure to protect your memory cards, and use it as a virtual USB pen drive with memory card inserted. Capable of being plugged directly into the USB port on any desktop or notebook computer. The driverless plug & play makes for easy installation and no driver software is needed. SuperSpeed USB 3.0 interface up to 5Gbps 10 times faster than USB 2.0, make it faster to transfer large file or the high definition movie With Dual Protection Caps there are two helmets around, help to protect the USB connector and memory card, easy to carry as a memory card enclosure Convert Memory Card to a USB Pen Drive the memory card is enclosed in the card reader and protected with cap Features 2 Slot Card Reader with dual protection caps Convert memory card to a USB pen drive Easy to carry as a memory card enclosure SuperSpeed USB 3.0 interface up to 5Gbps Backwards compatible with USB 2.0 Plug and Play, no software required Powered by USB port, support Windows and Mac Supported SD / SDHC / SDXC / microSD / microSDHC / microSDXC