Feature 1Bluetooth Function: Water quality tester with for Tuya APP compatible with for IOS, for Android cell phones, cell phones and equipment can be within a distance of 10 meters for real time data transmission. 26 in 1 Design: Water quality detection pen can realize PH.EC.TDS.SALT.S.G.TEMP six in one function detection. Suitable for domestic water, aquarium, aquaculture, catering food industry, fishery, swimming pool. 3Automatic Control: The product instrument in the case of no operation, disconnect the bluetooth, 8 minutes automatic shutdown, when you need to test the instrument, open the Bluetooth system automatically connects, better humanized. 4Multi Language Support: Water quality detection pen language support, Chinese traditional, English, French, German, Russian, Japanese, Korean, Spanish . 5Multi Formats: PH supports 6.86, 4.01, 9.18, 7.00, 4.00, 10.00, and 2 types of calibration. Supports mailbox data export function for hourly, daily, weekly, and monthly data, and sends it by email.Item Type: Water Quality TesterMaterial: ABSWeight: Approx. 192g/6.8ozSize: Approx. 18cm/7.1inBattery: 4 x AG13 Button Battery (Shipped Without Battery)Range:PH: 0.00-14.00PHEC: 0-19900us/cm 0-199.0 ms/cmTDS: 0-19900ppm 0-199.0pptSALT: 0-199.0ppt 0%-20S.G: 0.990-1.400Temperature: 0C-50C (32F-122F)Temperature Compensation: 0C-50CLanguage Support: Chinese, Traditional Chinese, English, French, German, Russian, Japanese, Korean, Spanish With for Tuya APP Compatible with for IOS and for Android Phones .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xWater Testing Pen (Batteries Not Included)1 x ManualNoteManual measurement please allow some error.