13 In 1 pH Meter: Multi function 3 in 1, can be used to measure temperature, TDS, PH value, to meet your different needs, suitable for water quality testing, practical for use. 2High Sensitivity Electrode Head: High sensitivity glass electrode, anti rust electrode, detachable. Light weight and compact, easy to store and carry. 3Data Storage And Sharing: Can be connected to BT, smart control by mobile app, data can be saved automatically and manually, the saved data can be exported to an Excel table, and it can also be shared with your friends. 4Data Synchronization Display: Just immerse the electrode in the solution to be tested, and the data will be synchronized to the mobile APP, easy to view data. 5Wide Range Of Applications: Widely used in drinking water, sewage treatment, water purification, fish tanks, aquaculture, swimming pools, hydroponics, health care, etc.1 x PH Meter1 x Lid1 x Manual