Maxxter mini-USB 300Mbps Wireless Device: Maxxter is a Dutch company. Their Mini-USB device is a bit larger than "nano" (twice as big). After compiling the GPL driver, installing it, the device was immediately recognized and ready to go. But the driver comes with a byte array for firmware "source".

Informations extracted from a device sold (2018) under the name : "CNYO® 300 Mbps Mini USB 2.0 Interface RTL8192 Wifi dongle Wireless LAN network card adapter XC1289 OFDM CCK 16-QAM 64-QAM DSSS".

lsusb
Bus 003 Device 002: ID 0bda:818b Realtek Semiconductor Corp. RTL8192EU 802.11b/g/n WLAN Adapter

Bus 003 Device 002: ID 0bda:818b Realtek Semiconductor Corp. RTL8192EU 802.11b/g/n WLAN Adapter
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0bda Realtek Semiconductor Corp.
  idProduct          0x818b RTL8192EU 802.11b/g/n WLAN Adapter
  bcdDevice            2.00
  iManufacturer           1 Realtek
  iProduct                2 802.11n NIC
  iSerial                 3 00e04c000001
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           53
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           5
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              2 802.11n NIC
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x06  EP 6 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x87  EP 7 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               3
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x08  EP 8 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           12
  bNumDeviceCaps          1
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      Link Power Management (LPM) Supported
Device Status:     0x0001
  Self Powered

10: USB 00.0: 0000 Unclassified device
  [Created at usb.122]
  Unique ID: mZxt.4rr1rNr4G60
  Parent ID: uIhY.2DFUsyrieMD
  SysFS ID: /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0
  SysFS BusID: 3-2:1.0
  Hardware Class: unknown
  Model: "Realtek 802.11n NIC"
  Hotplug: USB
  Vendor: usb 0x0bda "Realtek Semiconductor Corp."
  Device: usb 0x818b "802.11n NIC"
  Revision: "2.00"
  Serial ID: "00e04c000001"
  Speed: 480 Mbps
  Module Alias: "usb:v0BDAp818Bd0200dc00dsc00dp00icFFiscFFipFFin00"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #9 (Hub)