This HM Digital COM-80S Hydrotester is a top-quality tool suitable for water filtering, desalination, and water testing. It is designed to help you ensure that your water is safe and clean for consumption. The device is compatible with Rainman and is made by the trusted brand HM Digital. With this Hydrotester, you can easily test the TDS, EC, and temperature of your water. It is perfect for those who want to ensure that their water is pure and free from impurities. This product is a must-have for anyone who values clean and healthy drinking water.