its really good to use
it has a temperature sensor, colorometer, barometric pressure gauge, emf reader, light meter and the standard time and date settings. for the time it was made i would think it would be pretty nifty science tool, the lights they use are bright and the start up sounds are from the tricorder on the show.
it would be really cool if they could make one that would fold up like the originals. I've thought about maybe buying a 2nd and trying to make it fold, the board inside is pretty basic on the lower portion, but it would be a task.