bluetooth speaker appears as a keyboard?!?

I've just received a tiny bluetooth speaker - it's intended for a friend
who wants something for her iPhone so she can use it outdoors with the
'phone in a pocket or pouch, but as she wears hearing aids, she doesn't
want headphones - something that can sit on her shoulder (like a police
set).

I've found this one (Google EC101 bluetooth speaker). I'm _very_ taken
with it - it's well smaller than a matchbox, seems very well made, and
judging by the chimes it makes when you turn it on, it makes sound out
of all proportion to its size. And it has a clip on the back that will
attach it to a shoulder strap. (And it came from China in 9 days - I
ordered it thence as it was half the price UK sellers want it.)

However: I obviously want to test it before giving, so I tried with this
(XP) computer. On the second and subsequent tries the computer sees it
no problem (first time might have been finger trouble) - but thinks it's
a keyboard! (Not only that, but the computer pops up a "type this on
your bluetooth keyboard" so briefly that even if it was a keyboard, I'd
not be able to do it in time.)

Any thoughts? At the moment, I'm thinking that maybe it's incompatible
bluetooth versions: it says it's version 4.1, which I'm pretty certain
is a very recent one. I had assumed bluetooth versions were
backwards-compatible, but maybe they're not? (FWIW I have another
bluetooth speaker - a much bigger one - which works fine with this
machine.)
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

If you believe in telekinesis, raise my right hand