thanks guys. i also have a timer with no sound but led's flashing. great for test taking people. like sat or lsat . basically the sound has been mod to be silent and only lights will flash to let you know when the time is up.
yeah me too. duude, i got this when it just came out and my calculus teacher didnt know what this thing could do so i was allowed to use it during test and quiz day. it was awesome. i of course did things on my own but i used this to definitely check my answers. but i got all the questions correct at the end. hahahahaa. it does graphs. plots, tangents, cosin, sin and everything you would ever need. i have the manual so that you dont need to guess on how it works. also you can look for programs online to input it to make it do stuff you need. really kewl.