Good to know in case this Zalman breaks.
I used to own a different model with the dial which broke.
I'll find out the model number of mine when I find it out in the morning.
Some of the earlier IODDs had similar reviews to the Zalmans - but the model I have is really well built, has a really good touch pad and no move able flimsy parts - it's all solely keypad and menu based.
Highly recommended.