Device Descriptor:
bcdUSB:             0x0200
bDeviceClass:         0x00
bDeviceSubClass:      0x00
bDeviceProtocol:      0x00
bMaxPacketSize0:      0x40 (64)
idVendor:           0x0781
idProduct:          0x7421
bcdDevice:          0x0100
iManufacturer:        0x01
0x0409: "Rockbox.org"
iProduct:             0x02
0x0409: "Rockbox media player"
iSerialNumber:        0x03
0x0409: "3000000000000000087B3784006F60FED"
bNumConfigurations:   0x01

ConnectionStatus: DeviceConnected
Current Config Value: 0x01
Device Bus Speed:     Full
Device Address:       0x01
Open Pipes:              3

Endpoint Descriptor:
bEndpointAddress:     0x82
Transfer Type:   Interrupt
wMaxPacketSize:     0x0008 (8)
bInterval:            0x08

Endpoint Descriptor:
bEndpointAddress:     0x00
Transfer Type:     Control
wMaxPacketSize:     0x0507 (1287)
wInterval:          0x0281
bSyncAddress:         0x00

Endpoint Descriptor:
bEndpointAddress:     0x02
Transfer Type:     Control
wMaxPacketSize:     0x0000 (0)
wInterval:          0x0000
bSyncAddress:         0x07

Configuration Descriptor:
wTotalLength:       0x0039
bNumInterfaces:       0x02
bConfigurationValue:  0x01
iConfiguration:       0x00
bmAttributes:         0xC0 (Bus Powered Self Powered )
MaxPower:             0xFA (500 Ma)

Interface Descriptor:
bInterfaceNumber:     0x00
bAlternateSetting:    0x00
bNumEndpoints:        0x02
bInterfaceClass:      0x08
bInterfaceSubClass:   0x06
bInterfaceProtocol:   0x50
iInterface:           0x00

Endpoint Descriptor:
bEndpointAddress:     0x81
Transfer Type:        Bulk
wMaxPacketSize:     0x0200 (512)
bInterval:            0x00

Endpoint Descriptor:
bEndpointAddress:     0x01
Transfer Type:        Bulk
wMaxPacketSize:     0x0200 (512)
bInterval:            0x00

Interface Descriptor:
bInterfaceNumber:     0x01
bAlternateSetting:    0x00
bNumEndpoints:        0x01
bInterfaceClass:      0x03
bInterfaceSubClass:   0x01
bInterfaceProtocol:   0x01
iInterface:           0x00

HID Descriptor:
bcdHID:             0x0110
bCountryCode:         0x00
bNumDescriptors:      0x01
bDescriptorType:      0x22
wDescriptorLength:  0x0085

Endpoint Descriptor:
bEndpointAddress:     0x82
Transfer Type:   Interrupt
wMaxPacketSize:     0x0008 (8)
bInterval:            0x08