this file save device type informations:
# cat /var/lib/bluetooth/00\:19\:4F\:A4\:BB\:E2/classes
MAC DEVICE_TYPE_CODE

phone code: 0x522204
Uncategorised code: 0x001f00

If someone can write here the code of keyboard I will try to change it.

this file have features info: /var/lib/bluetooth/00:19:4F:A4:BB:E2/features
that are the same of hcitool info output.

probably I need to set this file too...
so I need keyboard class code and features