idVendor: 0x072F iManufacturer: ACS idProduct: 0x2200 iProduct: ACR122U PICC Interface bcdDevice: 2.06 (firmware release?) bLength: 9 bDescriptorType: 4 bInterfaceNumber: 0 bAlternateSetting: 0 bNumEndpoints: 3 bulk-IN, bulk-OUT and Interrupt-IN bInterfaceClass: 0x0B [Chip Card Interface Device Class (CCID)] bInterfaceSubClass: 0 bInterfaceProtocol: 0 bulk transfer, optional interrupt-IN (CCID) iInterface: ? CCID Class Descriptor bLength: 0x36 bDescriptorType: 0x21 bcdCCID: 1.00 bMaxSlotIndex: 0x00 bVoltageSupport: 0x07 5.0V 3.0V 1.8V dwProtocols: 0x0000 0x0002 T=1 dwDefaultClock: 4.000 MHz dwMaximumClock: 4.000 MHz bNumClockSupported: 0 (will use whatever is returned) IFD does not support GET CLOCK FREQUENCIES request: No such file or directory dwDataRate: 10752 bps dwMaxDataRate: 250000 bps bNumDataRatesSupported: 0 (will use whatever is returned) IFD does not support GET_DATA_RATES request: No such file or directory dwMaxIFSD: 256 dwSynchProtocols: 0x00000000 dwMechanical: 0x00000000 No special characteristics dwFeatures: 0x00020040 ....40 Automatic parameters negotiation made by the CCID 02.... Short APDU level exchange dwMaxCCIDMessageLength: 271 bytes bClassGetResponse: 0x00 bClassEnveloppe: 0x00 wLcdLayout: 0x0000 bPINSupport: 0x00 bMaxCCIDBusySlots: 1