Digital meters test for only one item. A different meter is needed for each type of test. There are several brands out there.
Hanna Checkers are quite popular:
Hanna Checker - Test Kits - PRODUCTS - English
There are other brands to check out as well.
Any particular reason you're looking for a digital tester? They're really only worth it if you have multiple tanks and/or $ to spend on them.
A good liquid test kit from Elos, Red Sea, and Salifert are just as good to be honest.