This 7-in-1 pH level test kit by YINMIC is perfect for those who want to keep their hydroponics, aquarium, saltwater, or pool clean and healthy. With its digital display, portable and waterproof features, this pH meter is easy to use and carry around. It measures temperature, humidity, and pH levels, making it a versatile tool for any gardener or pool enthusiast. The kit comes with a battery power source, making it convenient to use on-the-go. Its blue color adds a pop of style to your gardening or pool supplies. This pH meter is a must-have for those who want to ensure their plants or pool are healthy and thriving. Open box inspected new, unused