idVendor: 0x072F
  iManufacturer: ACS
 idProduct: 0xB501
  iProduct: ACR40T ICC Reader
 bcdDevice: 30.01 (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)
   Got 1 clock frequencies but was expecting 256
   Support 4000 kHz
  dwDataRate: 12903 bps
  dwMaxDataRate: 826000 bps
  bNumDataRatesSupported: 0 (will use whatever is returned)
   Support 689655 bps
   Support 500000 bps
   Support 344827 bps
   Support 250000 bps
   Support 215053 bps
   Support 171673 bps
   Support 156250 bps
   Support 129032 bps
   Support 125000 bps
   Support 93676 bps
   Support 86021 bps
   Support 62500 bps
   Support 43010 bps
   Support 31250 bps
   Support 21505 bps
   Support 15625 bps
   Support 10752 bps
   Support 7812 bps
   Support 5376 bps
   Support 2688 bps
   Support 1344 bps
  dwMaxIFSD: 247
  dwSynchProtocols: 0x00000000
  dwMechanical: 0x00000000
   No special characteristics
  dwFeatures: 0x000107BA
   ....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)
   ..04.. Automatic IFSD exchange as first exchange (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