Uasage: Test the purity of filter water quality, check your water filter performance, check its hardness, make sure you always drink pure water.(Please get the promo code on product page when purchasing to get a better price.) Quick and Accurate Readings: Turn it on, dip in liquid and read the display, no need to work with color charts or test strips; a large LCD display makes it easy to read. 3 in 1 function: temperature switching (automatic temperature compensation); Shift between TDS and conductivity with the "shift" switch Portable Design: Pocket pen style and compact carrying case make it easy to put in your pocket or bag and go on the go. anywhere. Wide Application: Ideal for water purifiers and filters, food and beverage (food, vegetable) quality monitoring, swimming pools and spas, aquarium, hydroponics. Product Description This is a digital TDS tester that tests the purity of filter water quality, checks your water filter performance , checks the hardness (1 grain =17 ppm) and ensures that you always drink pure water. Easy to read and record, 5 minutes of automatic shutdown, Energy saving energy. Touch the SHIFT button twice in succession, the degree Celsius is converted to Celsius, and the default instrument is Celsius. Water test Tds value and EC, also dis Installs a function of measuring water temperature and ambient temperature(This product cannot test PH.) The meter has automatic temperature compensation in measurement mode How to use: 1.Please unplug the electrode sleeve before use 2.Press the switch, put the electrode into the solution to review. 3.After digital stability, press the HOLD button and take it out of the solution to play. 4.After reading, turn off the player , wipe the electrode before putting it on. 5. TDS shows 0~9 pure water, 10~60 is mountain spring water, mineral water, 60~100 is purified water, 100~300 is running water, over 300 is contaminated water. Note: 1. Keep the electrode clean and cover the electrode cover. If not used for a long time, please remove the battery. 2. Clean the electrode with alcohol before or after use and dry it to avoid measurement errors. Specifications: Net weight: 51g TDS: 0-9990ppm Conductivity: 0-9990us/cm Accuracy: 2% F: 32-176 Celsius: 1-80 Size: 152289mm Contents: 1 X Quality Tester Water 1 X User Manual 1 x Leather Bag