Ⅰ. Product Description: PH tester electronic meter Bluetooth 7-1, ATC water quality tester / PH / TDS / EC / ORP / SG (accuracy 0.01), automatic calibration | drinking water, aquarium, swimming pool PH meter with lighting [7 in 1 PH/TDS and EC water tester with Bluetooth] This pH meter is designed for 7 in one size, the quality of liquids such as drinking water, aquariums, swimming pools, SPA, well water, etc. Indoors or on vacation, it can monitor the condition of daily life water. Comprehensive water quality measurement to check water quality. Ⅱ. [Precise measurement] pH range: 0.00-14.00; Resolution: 0.01 pH; Accuracy: ±0.05 pH; EC range: 0-9990μs/cm; TDS range: 1-9990 ppm; resolution: 1 ppm; accuracy: ±2%FS), the reading is fast and reliable. Ⅲ. [Smart Design]Supports mobile phone control backlight / mobile phone can display calibration records / Supports accurate on-site testing / Supports Excel sheet printing (Bluetooth) APP has Chinese and English for you to choose) Ⅳ. [Easy to use] After calibration, put the sensor into the test solution and get the data immediately; Before the next test, clean the probe thoroughly. Otherwise, you risk incorrect readings. Learn how to clean and test water to manage water use. Ⅴ. [Wide Application] It is suitable for home and laboratory pH testing, including drinking water, swimming pools, ponds, brewery, kombucha, aquariums, hydroponics, laboratories, food processing, etc.