what is it ???
how to use ???
for what ???
Looks like it is for programming the Atmel chip in an unlooper.
is it for any particular Dongle which has a Atmel chipset or it's for any Dongle or board which has Atmel Chipset ????
It is for a particular type of unlooper with Atmel AVR AT90S2313 chip. All very old. I'm not aware of any current application.