Features High Sensitivity: The purity of the sensitive probe is immediately visible and the high precision durable for almost accurate readings. Easy to use: Press the switch, put the test pen into the water to be tested, the lower the TDS value, the lower the solids content dissolved in the water, and the purer the water quality. Suitability: Our water quality tester is suitable for any type of test to check TDS or EC in your aquarium, swimming pool or any water source. Large screen LCD display: Dual screen data display, simultaneous display of TDS water quality, EC conductivity and temperature value with data retention function, easy to manage in a variety of environments. Portable: The digital water quality detector is small and portable; no matter where you are, traveling, playing, shopping, you can detect the TDS value of water at any time. Specifications: Item Type: TDS EC Meter Material: Plastic Battery Type: Button Battery Product dimensions: approx. 30 x 14 x 152 mm/1.2 x 0.6 x 6 inches Package List: 1 x TDS EC meter Package List 1 x TDS EC Meter