YueYueZou&reg; LCD Display Digital TDS Meter for Household Drinking Water/Aquarium Pool/Swimming Pools Accurate, consistent, easy to use professional TDS meter. Comes with a nice carry case so that you can also test the water on the go and keep it with you. Large and easy to read LCD screen. Batteries included. Carry one in your pocket or toolbox! Hold Function: Saves measurements for convenient reading / recording. Built-in digital thermometer. Order now with peace of mind due to our 60-day money back guarantee. See product description below