what an interested gadget!!! A digital water quality tester. Never have seen this product before. Got it for my water and pool. It gives a very detail and specific read for each test. The temperature of the water could also be examined. Measuring range: TDS: 0 - 9999 ppm; conductivity: 0 - 9999 µs/cm; temperature: 32 - 210°F/ 0 - 99°C; accuracy: ±2% F.S. And this is also perfect for my son's project at the school. Easy to use and no hustle!!!