Feature:1. High Precise Probe: Adopt high precise probe, which is corrosion resistance, has quick response, stable data measurement, and long lasting durability.2. WiFi Connection: The tester can connect to the mobile phone via WiFi, transmit data stably, you can view the current data, historical data on the phone, very convenient.3. Real Time Transmission: Data can be transmitted in real time, daily, weekly and monthly data can be viewed, the water quality can be easily grasped.4. APP Alarm Setting: The App can alarm when the data is abnormally high or low, easy to set via for Tuya, create a smart scene and set the security range, select the alarm method beyond the security range is ok.5. Wide Application: The tester is suitable for water source, soilless culture, aquarium, hydroponics, laboratory, spa, environmental water, swimming pool, water purification system, etc.Specification:Item Type: Water Quality MeterMaterial: ABSTemperature Compensation: 0 to 50Working Temperature: 0 to 50Range: PH: 0.00-14.00pHEC: 0-19000us/cm, 0-199.0ms/cmTDS: O-19990ppm, 0-199.0pptSalt: 0-199.9ppt, 0%-20%SG: 0.990-1.400Temperature: 0C to 50C (32F to 122F)Resolution: PH: 0.01PHEC: 1us/cm(<1000us/cm), 10us/cm(>1000us/cm), 0.1ms/cmTDS: 1ppm (<1000ppm), 10ppm (>1000ppm), 0.1pptSalt: 1ppm (<1000ppm), 10ppm (>1000ppm), 0.1ppt, 0.01%SG: 0.001Temperature: 0.1C (0.2F)Accuracy: PH: 0.03pHEC, TDS, SALT: 2%F.STemperature: 1.0.Package List:1 xWater Quality Meter2 x Probe3 x Installation Accessories1 x AdapterNote:If it has been used in water for a long time, it is recommended to clean and maintain the electrode regularly. For example, after 1015 days of continuous use, take the electrode out and clean with clean water, then recalibrate it once and wipe off the water stains with a dry cloth. ORP electrodes should be cleaned with toothpaste, because long term soaking in water will cause stains and impurities to contaminate the electrodes, which will shorten the service life of the electrodes. The PH electrode is recommended to be replaced after 3 months of continuous use. (Especially, the high salinity of seawater is corrosive to the electrodes, and regular cleaning and maintenance are required.)Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.