1. Bluetooth 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. 2. 6-in-1 Design: Water quality detection pen can realize PH.EC.TDS.SALT.S.G.TEMP 6-in-1 function detection. Suitable for domestic water, aquarium, aquaculture, catering food industry, fishery, swimming pool. 3. Automatic 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. 4. Multi Language Support: Water quality detection pen language support, Chinese traditional, English, French, German, Russian, Japanese, Korean, Spanish . 5. Multi 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 Tester Weight:.192g or 6.8oz Battery:4 x AG13 Button Battery (Shipped Without Battery) Range: PH:0.00-14.00PH EC:0-19900us or cm 0-199.0 ms or cm TDS:0-19900ppm 0-199.0ppt SALT:0-199.0ppt 0percent -20 S.G:0.990-1.400 Temperature:0C-50C (32F-122F) Temperature Compensation:0C-50C Language Support:Chinese, Traditional Chinese, English, French, German, Russian, Japanese, Korean, Spanish With for Tuya APP Compatible with for IOS and for Android Phones How to Use: 1. Remove the protective cover. Open the meter. 2. Clean the electrode with distilled water and dry the electrode with filter paper. 3. Dip the electrode into the test solution. 4. Stir gently and wait for the reading to stabilize. 5. Press the "Mode" button briefly to select the modeof measurement. 6. Turn off the meter after use. Clean the electrode with distilled water to minimize contamination. 7. Replace the protective cover after use. Colour:Blue Material:Plastic Size:. 18cm or 7.1in Package Contents: 1 x Digital Water Tester 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.