Smart Card Reader is a SIM-sized smart card reader that is small, but packs a lot of features. With its MicroUSB OTG interface, ACR39T-A3 is capable of supporting most of the mobile devices in the market today that run applications using SIM-sized contact smart cards. This provides the perfect balance between dependable functionality and design aesthetics to meet your security requirements in smart card-based applications. supports ISO 7816 smart cards, GSM 11. 11-compliant cards, various memory cards, and microprocessor cards with T=0 and T=1 protocol. This compact smart card reader can also readily support micro-SIM‒sized cards. It can be easily integrated with any mobile device running on the Android™ platform with versions 3. 1 and above, and may be used in Windows®, Linux®, or Mac OS®, with its PC/SC and CCID compliance.Weighing nothing more than your standard USB stick, ACR39T-A3 is a device that you can bring anywhere to keep smart card technology right at your fingertips.