TDS, EC, Celsius and Fahrenheit temperature detection 4 in 1, the detection range is 0-9990ppm, backlit LCD screen, easy to read, the machine has a memory function, automatically open the last setting when it is turned on. The accuracy of this TDS water quality detector is up to 2%, equipped with a high-quality titanium alloy probe and automatic temperature compensation (ATC) function to that the reading accuracy is not affected by temperature changes. Remove the electrode protection cover, press the on/off button, insert the probe into the water and stir no more than 1.5 inches, the water quality reading will be displayed within 0.1 seconds. Press the SHIFT key to switch the function mode, and press the HOLD key to lock the measurement results for easy reading and recording. It will automatically turn off if there is no operation for more than 5 minutes. Portable and mini TDS meter allows you to test water quality anytime and anywhere, it is the for traveling, swimming, beach and camping. This device can measure the purity of drinking water, detect whether the reverse osmosis ()/DI system is working properly and whether the filter needs to be replaced, it helps to maintain the aquarium, hydroponic, swimming pool, and improves quality of life . Color: Black Material: ABS Package Contents: 1 pcs x tds meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.