High measuring accuracy Chlorine (0 - 3.0 mg/l) and pH values (6.8 - 8.2) are tested with high accuracy. They have a certainty and can counteract if necessary.
Intuitive Self-explanatory is the operation of the tester. And if you are ever unsure: A look at the packaging and the intuitively understandable instructions are sufficient to eliminate the ambiguity.
Ergo mixed The ergonomically optimized lid ensures a secure grip.