Features 1. Easy to Use: Press the switch - place it in the test water - after the number stabilizes, press and hold the button - take it out to read. Nothing is easier than this. 'Hold' automatically locks, 'Shift' automatically switches, and automatically turns off after 5 minutes. 2. What is TDS: Total dissolved solids refer to the total amount of movable charged ions dissolved in a certain capacity of water, including minerals, salts, or metals, which are directly related to the purity of water and the purity of water purification systems, and affect everything in water consumption, daily life, or use, whether organic or inorganic, whether good or bad. 3. Essential Tools for Every Household: Immediately check the overall quality of your and your family's drinking water. Know if your tap water purification system, such as reverse osmosis, is working properly or needs to be replaced to protect your and your family's health! Know when to replace filters, maintain aquariums, add nutrients, or remove pollutants from water! 4. Digital Water Quality Detector: It can detect the TDS value of water at any time. 2-in-1 water quality TDS value and conductivity. The integrated design of the 1-body electrode and controller is easy to carry and use. Automatic temperature compensation, automatic temperature compensation, can ensure accuracy in case of temperature changes. 5. Widely Used: Widely used indoors and outdoors, such as for testing domestic water, camping or any outdoor sports, fish farming, and planting. Compact and easy to carry. Specification Material: ABS Color: White, Blue Size: 16 x 3 x 3 cm Weight: 90 g Package Include: 1x TDS Meter Digital Water Quality Tester