Features 1、Quick And Accurate Readings: Simply open the portable EC water tester, submerge it in water about 1 inch deep, and read the display for fast and accurate readings. The large digital display makes it easy to read and interpret the results with accuracy and clarity. 2、Automatic Calibration: With no need for adjustments or screwdrivers, the digital water quality meter features automatic calibration that completes calibration in just 1-3 seconds, ensuring good and consistent readings to accurately determine when to replace water filters for optimal performance. 3、Portable Design: The handheld and compact design of the water quality testing pen, along with its convenient storage case, allows for easy carrying in your pocket or bag, making it ideal for testing and monitoring of water quality wherever you are. 4、Wide Application: Suitable for a variety of household and laboratory testing applications, including drinking water, swimming pools, aquariums, hydroponics, and more, the conductivity tester pen is versatile and good for ensuring water safety and quality in various settings. 5、Easy To Use: This water quality tester is very easy to use, just remove the protective cap, press the on and off key to switch on the meter, immerse it in the solution to be tested, stir gently, wait for the reading to stabilise, press the hold key to lock the reading, and then you can remove it from the solution. Specifications Item Type: Conductivity Tester Pen Material: ABS Size: Approx. 175mm / 6.89in Measurement Range: 0-1999μS/cm, 1μS/cm Accuracy: ±2% f.s. Temperature Compensation: 0-50°C (32-122°F) Environment: 0-50°C (32-122°F), 95% Relative Humidity, Non Condensing Battery: 4 x 1.5V (AG-13) Button Batteries (Not Included) Application: Drinking Water, Household Water, Agricultural Irrigation, water plant Laboratory, Swimming Pool, Aquaculture Weight: Approx. 170.00g / 6oz Package List 1 x Conductivity Tester Pen 1 x Accessory 1 x Manual 1 x Storage Box