Type whatever is printed on the case. We will work out which family it belongs to.
There are more handheld radios in the world than any one site can cover by hand, and we would rather say so than pretend otherwise. Two things are worth doing.
CHIRP is free software that talks to radio models across more than brands. You need a programming cable, and after that you fill in a table on screen rather than counting menu presses. For anything with more than a handful of channels it is faster than the keypad anyway.
What gets added next is decided by what people ask for. Tap a radio below and it climbs the queue.
Written guides covering the same ground, one page per radio family.