1. Better Humanization: When the water quality tester is disconnected from Bluetooth without operation, it will automatically shut down in 8 minutes. When the water quality tester needs to be tested, the Bluetooth system will automatically connect, making it more user friendly.2. Bluetooth BT Features: The water quality tester is compatible for IOS and for Android phones, support for Tuya APP. The phone and device can transmit real time data within a distance of 10 meters.3. Reliable Performance: Water quality testing pen supports email data export function, sent hourly, daily, weekly, and monthly in the form of email.4. Supported Languages: Language support for Chinese, Traditional Chinese, English, French, German, Russian, Japanese, Korean, Spanish.5. 5-in-1 Function: Water quality testing pen has EC TDS SALT S.G TEMP five in one function detection, providing you great using experience.Item Type:Water Quality TesterBattery:2 x CR2032 Button BatteryScope:EC:0-19900us/cm 0-199.0 ms/cmTDS:0-19900ppm 0-199.0pptSALT:0-199.0ppt 0% -20%SG:0.990-1.400Temperature:0C-50C (32F-122F)Resolution:EC:1us/cm (1999us/cm), 0.1ms/cmTDS:1ppm (1999ppm), 0.1 pptSALT:1ppm (1999ppm)Accuracy:EC, TDS, SALT: 2% F.STemperature Compensation:0C-50CWorking Temperature:0C-50CLanguage Support For Chinese, Traditional Chinese, English, French, German, Russian, Japanese, Korean, SpanishColour:White & GreenMaterial:ABSSize:.18x4x1.5cm/7.1x1.6x0.6inPackage Contents:1 x Water Quality TesterOnly 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.