Accurate And Reliable : Equipped With A Premium Quality Probe And An Efficient Chip, Ensuring Stable Performance And Exceptional Accuracy, Making It A Trustworthy Water Quality Tester. Multipurpose Tds Tester : Test The Purity Of Drinking Water, Monitor If Ro Systems Work Properly, Whether Filters Need Replacement, Maintain Aquariums, And Ensure Healthy Water Conditions For Pets. Wide Application : Suitable For Testing Drinking Water, Pet Water, Fish Tank Water, And Gardening Water, Offering Versatility For Everyday Use. Light Alarm Function : Green Backlight For Tds < 40, Red Backlight For Tds > 40, Alerting You To Water Quality Changes. Automatic Shutdown : Conserve Battery Life With Automatic Power Off After 2 Minutes Of Inactivity. Experience peace of mind knowing your water is safe and pure. Our digital water quality tester is your go-to tool for ensuring the health of your loved ones and pets. With its accurate readings and wide range of applications, it's the perfect companion for everyday water quality checks. Stay informed and take action with our multipurpose tds tester today! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.