idVendor: 0x072F
  iManufacturer: ACS
 idProduct: 0x221A
  iProduct: ACR1251 Dual Reader
 bcdDevice: 2.00 (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: ACR1251 Dual Reader PICC
 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: Success
  dwDataRate: 10752 bps
  dwMaxDataRate: 250000 bps
  bNumDataRatesSupported: 0 (will use whatever is returned)
   IFD does not support GET_DATA_RATES request: Success
  dwMaxIFSD: 512
  dwSynchProtocols: 0x00000000
  dwMechanical: 0x00000000
   No special characteristics
  dwFeatures: 0x00040040
   ....40 Automatic parameters negotiation made by the CCID
   04.... Short and Extended APDU level exchange
  dwMaxCCIDMessageLength: 522 bytes
  bClassGetResponse: 0x00
  bClassEnvelope: 0x00
  wLcdLayout: 0x0000
  bPINSupport: 0x00
  bMaxCCIDBusySlots: 1
 idVendor: 0x072F
  iManufacturer: ACS
 idProduct: 0x221A
  iProduct: ACR1251 Dual Reader
 bcdDevice: 2.00 (firmware release?)
 bLength: 9
 bDescriptorType: 4
 bInterfaceNumber: 1
 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: ACR1251 Dual Reader SAM
 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: Success
  dwDataRate: 12903 bps
  dwMaxDataRate: 344100 bps
  bNumDataRatesSupported: 0 (will use whatever is returned)
   IFD does not support GET_DATA_RATES request: Success
  dwMaxIFSD: 254
  dwSynchProtocols: 0x00000000
  dwMechanical: 0x00000000
   No special characteristics
  dwFeatures: 0x000200BA
   ....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
   02.... Short APDU level exchange
  dwMaxCCIDMessageLength: 288 bytes
  bClassGetResponse: 0x00
  bClassEnvelope: 0x00
  wLcdLayout: 0x0000
  bPINSupport: 0x03
   PIN Verification supported
   PIN Modification supported
  bMaxCCIDBusySlots: 1