Suitable for drinking water, swimming pool, aquarium, reverse osmosis system, spa or hydroponics. The tester has a sensitive electrode sensor to read accurate values, convenient to use. High-quality ABS material, wear-resistant, durable and long-lasting. Easy and convenient to use, very suitable for children's school science experiments. Wide application, sensitive test, accurate measurement and easy operation. Specification: Condition: 100% New Item Type: Water Quality Tester Material: ABS Conductivity: 0.055 us/cm TDS: 0-1,000 ppm Celsius: 0.1-80.0 C Fahrenheit: 32.0-176, 0F Battery: 3 x 1.5LR44 (included) Approximate weight. 79g / 2.8oz Package List: 1 x Water Quality Tester (Including Battery) 1 x User Manual