· Heavy Duty Brass Inlet and Metal Thread Enhance Durability.· Easy-To-Read LCD Displays 4 Measure Modes.· Mode 1: Real-Time Water Flow Rate (GPM or LPM).· Mode 2: Last-Time Water Consumption.· Mode 3: Daily Average Water Usage of a Week (count from next day).· Mode 4: Total Water Consumption.· Gallons & Liters Switchable. Long press the button at flow mode to switch the unit (US gallon to liter).· Less Than 5% Measurement Tolerance.· Prevents Over-Watering. Powered by 1 x CR-2032 Battery (included).· According to the specifications, the water meter products, like other similar products on Amazon, are designed for residential purposes. So, the measurable water flow rate ranges 0.3~12 GPM (1~45.5 LPM). Whenever the water flow rate goes beyond 12 GPM, there will be “HHH” error code. Recommend is to adjust the fancy faucet to a modest water flow rate so that water meter can read. You don't have to turn the faucet to max.