The product descriptionCR319 is a contact smart card reader, smart card and SIM card in one, with smart card slot and SIM card slot, can be used alone, not at the same time. Supports ISO 7816 compliant class A, CLASS B, and class C smart cards (5V, 3V, and 1.8V) that communicate with PC environments through USB interfaces compatible with different operating systems.The system supportsWindows XP or higherLinuxredhead9, Ubuntu8.04 and aboveProduct featuresUSB2.0 standardSupports hot swapSmart card /SIM card, dual card slot design socket, can support at least 100,000 times of card insertion and removalMain control chip: AU9580 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.