The HID Omnkey 6121 USB dongle facilitates the reading of sim cards and similarly sized cards. It's small form factor makes it very practical and portable and plug-and-play functionality and CCID compliance makes usage easy. The hardware and software of the Omnikey 6121 is based on the same standards as the desktop range of readers, permitted easy integration into existing systems. This reader has been designed to work with almost all contact chips on almost any operating system.