[WiFi 7-in-1 Chlorine Meter] Professional water quality tester for measuring pH, salinity, ORP, chlorine, EC, TDS, and temperature in swimming pools. Smart chlorine meter to get 7 measurements at the same time, saving time and effort. [USB & Solar Powered Design] Two charging modes design, supports both solar and USB charging, no need to worry about running out of power, lower power consumption and longer durability. IP67 waterproof design [Water quality alarm] The highest or lowest value of measurement can be set according to demand in the smart scene, the detection result is out of range can be prompted on the APP, allowing you to disinfect the pool at the best time [Wide Applications] Suitable for swimming pools, aquaculture, fish tanks, modern agriculture, wastewater treating, river water quality testing, etc. 7-in-1 PH Meter Specifications: PH Range:0.0-14.0 Resolution:0.1ph Accuracy:±0.1ph CL Range:0.0-4.0mg/L Resolution:0.1mg/L Accuracy:±0.1mg/L Salt Range:0-999ppm, 1000-9990ppm Resolution:1ppm, 10ppm Accuracy:±2% F.S. EC Range:0-2000us/cm, 2000-9990uS/cm,10.01- 19.9mS/cm Resolution:1uS/cm 10uS/cm 0.01mS/CM Accuracy:±2% F.S. TDS Range:0-999ppm,1000-9990pp Resolution:1ppm 10ppm Accuracy:±2% F.S. ORP Range:±999mv Resolution:1mv Accuracy:15mv Temperature Range:0.0℃-50.0℃ 32.0℉-122.0℉ Resolution:0.1℃/0.1℉ Accuracy:±0.5℃ Battery:USB, Solar Powered Support APP:Tuya, Smart Life. Calibration:pH:6.86/4.00/9.18 or 7.00/4.00/10.01, EC:1413uS/cm, 12.88ms/cm, ORP:222mv All functions have been calibrated when the product is sent out, please use it directly Use: Use with a gateway, Without Gateway Name:Pool Water Tester Colour:As Shown Material:Plastic Package Contents: 1 * Pool Water Tester 1 set * calibration fluid Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.