Two easy setup options pipeline versions (with 2/3-way connectors) or faucet version pipeline models include a built-in 2-way connector and optional 3-way adapter, and the faucet version can be installed directly into the water outlet Designed for continuous water filtration setups such as household water filters, fountains, aquariums and commercial systems, users can track the position of the filter and determine the best replacement timing through real-time readings ABS construction resists direct water Flowing in the environment between 0 ~ 50 ℃ Compact 38x56mm size (100g weight) fits seamlessly in your kitchen or in humid spaces and maintains stability under standard conditions The pipeline version will automatically shut down after 1 to activate manually. Faucet version will automatically start when filled with water and stop after 12 seconds with CR2450 coin battery, standby power is only 100uA, working current is 2.5mA This recessed water quality tester has a measuring range of 0 to 999PPM with ±2% accuracy, and it uses 3 color LED indicates that the green is 0~50PPM / good, yellow is 51~300PPM / qualified / red is 300P+ / inapplicable, Manufacturer: Lerpwige