Product Description: Features: - Intelligent pen-type 3-in-1 water quality tester - Microprocessor-based fast and accurate display - New rugged and ergonomic design - Stylish, compact, and portable - Large backlit screen for clear display, with simultaneous temperature reading - Automatic temperature compensation - Main unit waterproof with IP65 rating - Low battery indicator - Auto power-off - Scientifically designed national standard packaging - Uses AAA batteries for high capacity and long-lasting performance, ensuring accurate and fast measurements while reducing calibration frequency