usbconfig -d ugen1.2 dump_all_desc

ugen1.2: <MO LK202-25-USB> at usbus1, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (500mA)

  bLength = 0x0012 
  bDescriptorType = 0x0001 
  bcdUSB = 0x0200 
  bDeviceClass = 0x0000  <Probed by interface class>
  bDeviceSubClass = 0x0000 
  bDeviceProtocol = 0x0000 
  bMaxPacketSize0 = 0x0008 
  idVendor = 0x1b3d 
  idProduct = 0x0155 
  bcdDevice = 0x0600 
  iManufacturer = 0x0001  <MO>
  iProduct = 0x0002  <LK202-25-USB>
  iSerialNumber = 0x0003  <01wwk141>
  bNumConfigurations = 0x0001 

 Configuration index 0

    bLength = 0x0009 
    bDescriptorType = 0x0002 
    wTotalLength = 0x0020 
    bNumInterfaces = 0x0001 
    bConfigurationValue = 0x0001 
    iConfiguration = 0x0000  <no string>
    bmAttributes = 0x0080 
    bMaxPower = 0x00fa 

    Interface 0
      bLength = 0x0009 
      bDescriptorType = 0x0004 
      bInterfaceNumber = 0x0000 
      bAlternateSetting = 0x0000 
      bNumEndpoints = 0x0002 
      bInterfaceClass = 0x00ff  <Vendor specific>
      bInterfaceSubClass = 0x00ff 
      bInterfaceProtocol = 0x00ff 
      iInterface = 0x0002  <LK202-25-USB>

     Endpoint 0
        bLength = 0x0007 
        bDescriptorType = 0x0005 
        bEndpointAddress = 0x0081  <IN>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0040 
        bInterval = 0x0000 
        bRefresh = 0x0000 
        bSynchAddress = 0x0000 

     Endpoint 1
        bLength = 0x0007 
        bDescriptorType = 0x0005 
        bEndpointAddress = 0x0002  <OUT>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0040 
        bInterval = 0x0000 
        bRefresh = 0x0000 
        bSynchAddress = 0x0000 


before the device is plugged in...
ls -a /dev/

.          ada0s1a    audit      consolectl crypto     cuau1      devstat    geom.ctl   kbd1       md0        music0     pass0      reroot     stdin      ttyu0.init ttyv0      ttyv5      ttyva      ugen1.1    urandom
..         ada0s1b    auditpipe  cpuctl0    ctty       cuau1.init dumpdev    hpet0      kbdmux0    mdctl      netdump    pci        sequencer0 stdout     ttyu0.lock ttyv1      ttyv6      ttyvb      ugen2.1    usb
acpi       apm        bpf        cpuctl1    cuau0      cuau1.lock fd         input      klog       mem        netmap     pf         sndstat    sysmouse   ttyu1      ttyv2      ttyv7      ufsid      ugen3.1    usbctl
ada0       apmctl     bpf0       cpuctl2    cuau0.init devctl     fido       io         kmem       midistat   nfslock    pts        speaker    tcp_log    ttyu1.init ttyv3      ttyv8      ufssuspend ugen4.1    xpt0
ada0s1     atkbd0     console    cpuctl3    cuau0.lock devctl2    full       kbd0       label      mlx5ctl    null       random     stderr     ttyu0      ttyu1.lock ttyv4      ttyv9      ugen0.1    uinput     zero

after the device is plugged in
ls -a /dev/
.          ada0s1b    bpf        cpuctl2    cuau0.lock devstat    hpet0      klog       midistat   null       reroot     stdout     ttyu1      ttyv3      ttyv9      ugen1.1    urandom
..         apm        bpf0       cpuctl3    cuau1      dumpdev    input      kmem       mlx5ctl    pass0      sequencer0 sysmouse   ttyu1.init ttyv4      ttyva      ugen1.2    usb
acpi       apmctl     console    crypto     cuau1.init fd         io         label      music0     pci        sndstat    tcp_log    ttyu1.lock ttyv5      ttyvb      ugen2.1    usbctl
ada0       atkbd0     consolectl ctty       cuau1.lock fido       kbd0       md0        netdump    pf         speaker    ttyu0      ttyv0      ttyv6      ufsid      ugen3.1    xpt0
ada0s1     audit      cpuctl0    cuau0      devctl     full       kbd1       mdctl      netmap     pts        stderr     ttyu0.init ttyv1      ttyv7      ufssuspend ugen4.1    zero
ada0s1a    auditpipe  cpuctl1    cuau0.init devctl2    geom.ctl   kbdmux0    mem        nfslock    random     stdin      ttyu0.lock ttyv2      ttyv8      ugen0.1    uinput