Model Number: HL-SB04 Brand Name: HOLLEY INTL Key Specifications/Special Features: Prepayment: meter will shut valve of meter head automatically and forbid water-using while no water remains in RF cardAlarm: low battery voltage or remaining water and breakdown or disoperation of valve could be displayed by meter or be alarmed by valve control systemBattery activation: meter can activate battery by discharging term to prevent lagging of Lithium batteriesMagnetism interference alarm: meter will shut down valve to forbid water-using illegally while interfered by external magnetism or data-achieving line spoiled, using user's card can make meter to normal unction if external affection repealedAvoidance of water hoarding: while remaining water more than minimum credit amount, forbade that users input new-bought water into meter, as long as remaining water less than minimum credit amount, users can input new-bought water into meter

Inspection: maintenance personnel and background management system can inspect and analyze data which read-out by using inspection card

Power source: 1 built-in Lithium battery

Sleep state current: less than 10

Head lose: less than 0.1MPa