Features: Made-with high-quality ABS-material, our digital-water tester features an easy-to-read LCD-display, automatic temperature compensation, and a compact design that fits comfortably in your hand. Ideal-for aquarists, hydroponic-growers, pool-owners, and anyone who-needs to monitor-water quality, our nutrient testing pen is easy to use and provides accurate-results every-time. Whether you're checking the purity of fresh-water or ensuring the efficiency of your RO-system, our TDS-meter is the perfect tool for the job. It is also great for monitoring the water quality in aquariums, swimming pools, and saltwater tanks. With our TDS-Meter Digital-Water Tester, you can take the guesswork out of water quality testing and ensure that your-water is safe and healthy for all your aquatic-pets and-plants. Pocket size, light and portable, backlight-switchable, large LCD-screen, clear reading. Specifications: Material:ABS Size:Approx.18.7x3.7x3.7cm/7.36x1.45x1.45inch Model:EZ-9908 Measuring range: 0-14pH. Measurement accuracy: 0.05 ph. Package Includes: 1x Water Quality Tester 1x User Guide note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.