This is really a game changer for monitoring and keeping your hydroponic garden chemistry under control. The UIUZMAR multi parameter monitor makes is easy to keep track of everything going on in your nutrient tank, and you can even get the results wirelessly on your phone through the app. Setup is a snap, just soak the sensor in some distilled water for a couple minutes out of the box, attach it to the controller, mount it, and put the sensor in your nutrient tank. The whole process took me 20 minutes because I took extra care and was reading the directions thoroughly. I also verified the pH calibration with the included standard fluids and the sensor was spot on and did not need any adjustment. Linking to the app was incredibly easy. I had already installed the Tuya Smart app for a couple other devices in the past, and when I launched the app, it automatically asked me if I want to add the water quality tester. I clicked yes, and all the data popped up on my screen. Another really neat thing you can do is set Min and Max limits for the parameters, and you should get an alert sent to your phone if something gets out of alignment. Overall, this is a very high quality instrument that works as advertised and is easy to set up. I am very impressed with how it functions and how it has made monitoring my indoor garden much simpler and something I can do more often.