Material: ABS Size: 2.6*9*16cm / 1.01"*3.51"*6.24" Color: Blue app Connection Instructions You need to long press the water tester on/off to turn on Bluetooth, and then authorize the location information permission of the app 1.Smart Mobile App Intelligent Control for Effortless Testing Easily monitor your pool water quality through the dedicated mobile app that automatically synchronizes real-time data from the tester. Simply immerse the electrode in the water, and multiple key parameters will instantly display on your smartphone, making pool maintenance more convenient and efficient than ever. 2.Automatic and Manual Data Storage with Easy Sharing This water tester automatically saves your measurement data, and you can also manually store results for detailed tracking. Export your data directly to Excel for analysis or share it effortlessly with friends and family, helping you keep everyone informed about pool conditions. 3.Customizable Measurement Ranges with Alert Function Set your own maximum and minimum limits for PH EC, and ORP values based on your pools specific requirements. When readings exceed preset thresholds, the values are highlighted in red on the app, allowing you to quickly identify and address water quality issues. 4.Accurate Measurement with Automatic 5-Point Calibration Ensure precise and reliable readings thanks to the advanced automatic 5-point calibration system. The tester includes calibration powder and allows selection between Asia and EU standards within the app, providing flexibility and accuracy tailored to your needs. 5.User-Friendly Design for Quick and Reliable Water Quality Testing Designed for easy operation, just immerse the electrode in the pool water and get synchronized data displayed instantly on your mobile device. No need for repeated operations or complicated setupsthis tester helps you maintain healthy pool conditions efficiently. Package includes: Monitor*1