 idVendor: 0x072F
  iManufacturer: ACS
 idProduct: 0xB506
  iProduct: ACR40U ICC Reader
 bcdDevice: 30.02 (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)
 Can't get iInterface string: LIBUSB_ERROR_INVALID_PARAM
 CCID Class Descriptor
  bLength: 0x36
  bDescriptorType: 0x21
  bcdCCID: 1.10
  bMaxSlotIndex: 0x00
  bVoltageSupport: 0x07
   5.0V
   3.0V
   1.8V
  dwProtocols: 0x0000 0x0003
   T=0
   T=1
  dwDefaultClock: 4.800 MHz
  dwMaximumClock: 4.800 MHz
  bNumClockSupported: 0 (will use whatever is returned)
   IFD does not support GET CLOCK FREQUENCIES request: LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
  dwDataRate: 12903 bps
  dwMaxDataRate: 826000 bps
  bNumDataRatesSupported: 0 (will use whatever is returned)
   IFD does not support GET_DATA_RATES request: LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED
  dwMaxIFSD: 247
  dwSynchProtocols: 0x00000000
  dwMechanical: 0x00000000
   No special characteristics
  dwFeatures: 0x000103BA
   ....02 Automatic parameter configuration based on ATR data
   ....08 Automatic ICC voltage selection
   ....10 Automatic ICC clock frequency change according to parameters
   ....20 Automatic baud rate change according to frequency and Fi, Di params
   ....80 Automatic PPS made by the CCID
   ..01.. CCID can set ICC in clock stop mode
   ..02.. NAD value other than 00 accepted (T=1)
   01.... TPDU level exchange
  dwMaxCCIDMessageLength: 512 bytes
  bClassGetResponse: 0xFF
   echoes the APDU class
  bClassEnvelope: 0xFF
   echoes the APDU class
  wLcdLayout: 0x0000
  bPINSupport: 0x00
  bMaxCCIDBusySlots: 1
