Hacking a String Pot / Smart String

Hi Everyone,

I was looking for advice on hacking the following.

http://www.ebay.com.au/itm/290647014507?nma=true&si=FJPbdHKPQgZifHuHZFLeESH4Xvk%3D&rt=nc&_trksid=p4340.l2557&orig_cvip=true#ht_1387wt_1163

It's basically a string pot and calculator display. Is there a way to hack the output to the screen to grab the numbers? i.e. Processed and not directly from the encoder/potentiometer? If so do you know of anyone that's done this before with other devices?

I've not got it yet to try but I've had a look and not found anything.

Thanks in advance.