Certification : CEWith Backlight Or Not : NOIs Smart Device : NOModel Number : TDS-M1SDisplay Type : DIGITALColor : WhiteMaterial : ABS materialMeasuring range : 0~9990ppmPower supply voltage : 3VMeasurement accuracy : 1ppmProduct size : 15.0 x 2.80 x 1.5cmBattery : CR2032 button battery*1(not included)PPM Aquarium Filter : Digital Water TesterTDS-M1S Water Quality Test Pen Portable Digital Analyzer For Aquarium Pool Water Monitor 0-9990ppmFeatures:1. LCD display, high-definition display clearly display, easy to read the value.2. It can be used such as water purifier testing, tap water testing, aquaculture testing, including plant breeding, aquaculture, and so on.3. Titanium alloy probe, anti-rust sensitive value is accurate and free from magnetic interference.4. The buttons are easy to understand and durable, and the functions are convenient. After tens of thousands of button tests, they are durable.5. It does not take up space and is convenient to carry around.Specification:Color: WhiteMaterial: ABS materialMeasuring range: 0~9990ppmPower supply voltage: 3VMeasurement accuracy: 1ppmProduct size: 15.0 x 2.80 x 1.5cmBattery: CR2032 button battery*1(not included)List:Water quality test pen*1