Yesterday the package arrived.. I had been waitig for it so eagerly! this instrument, that came from India to me (Thank you Robert!!) is a Sunadamala Lahara, and is a practise aid for tabla players and... Kathak dancers. It is a metronome, and you have not only the beats, but also a simple melody (lahara) over a beat circle (taal).
So I hope to improve my footwork (tatkar) with much practice and also my students will benefit from this new instrument, which gives the rhythm much more precisely than me ;-)