This instrument is combination of pro10 and pro20 instruments.
Its features are:-
1) User-replaceable cables and sensors provide versatility, reduce down         time and reduce overall cost of ownership.
2) Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable            management kit included on all cables 4-m and longer).
3) Smart calibration; the instrument remembers the previous calibration          values and simply walks you through the routine.
4) Stores 50 data sets; no need to write down data.