Feature:1. Display the instant temperature of the liquid, and the temperature reading can be switched between or by pressing the button.2. Waterproof design, waterproof grade is IP65. Powered by 4 x 1.5V (AG13) batteries (not included).3. Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures.4. Wide use, pocket size TDS/ TEMP meter is the ideal test tool for home and laboratory uses.5. Compact size, portable, light weight and easy to carry around, convenient to use.Specification:Item Type: TDS/TEMP MeterMaterial: ABS+PCBColor: As shown in the pictureMeasuring Range: 0~19990 mg/L (ppm); temperature: 0 ~50Resolution: 1ppm (mg/L); temperature: 0.1Accuracy: 2% FSWorking Environment: 0 ~ 50; RH 95%Automatic Temperature Compensation: 0 ~50Battery: 4 x 1.5V (AG13) (not included)How to Use1. Remove the pen cap. Press the power button to fill 2/3 of the cap with the water to be tested.2. Put the pen into the water to be tested and gently stir to remove air bubbles in the pen.3. After 3 seconds, wait for the reading to stabilize and check the reading on the display..Package List:1 x TDS/TEMP Meter(Battery Not Included)1 x Screwdriver1 x Instruction ManualNote:Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.