Specification: Condition: 100% Brand New Item Type: Water Quality Tester Material: ABS Conductivity: 0.055us/cm TDS: 0-1000ppm Celsius: 0.1-80.0℃ Fahrenheit: 32.0-176.0℉ Battery: 3 x 1.5LR44 (Included) Weight: Approx. 79g / 2.8oz Package List: 1 x Water Quality Tester (Battery Included)1 x User Manual Features Multifunctional: Professional TDS, EC, Salinity, Seawater gravity, and Temperature Pen 5 in 1. Upgraded with big backlit LCD for easier reading, very suitable for scientific experiments in children schools. Easy and Instantly: Just turn the TDS meter on and stir water gently, then stabilized readings will be auto-locked on LCD in seconds, sensitive test, accurate measurement and simple operation. Accurate and Reliable: The tester has a sensitive electrode sensor to read accurate values, practical to use,and reliable Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures. Easy to Use and Accurate: The water quality detector tester is compact and doesn't need any maintenance. The TDS water tester can respond quickly and with stable readings, with the calibration function to ensure high accuracy. Wide Application Range: This water quality tester detector is made of premium quality ABS material, wear-resistant, durable and long life,suitable for drinking water, swimming pool, aquarium, reverse osmosis system, spa or hydroponic.