quality brass construction: durable and corrosion resistant, designed for long life and to withstand pressure water flow without leakage or damage. Efficient and precise flow control: uses electromagnetic pulses to open and close the valve, allowing accurate regulation of water flow for irrigation or other applications. Easy installation and operation: quick setup with clear instructions and all components; simple on/off switch to control water flow. Wide range of applications: suitable for water supply systems, irrigation systems, industrial equipment, and more. Key specifications: DC 4.5V, 1/2 inch connection, Water Flow Pulse Electromagnetic Valve. Use scenarios: 1) Garden irrigation systems requiring precise zone control and minimal water waste. 2) Greenhouse hydroponics or drip irrigation setups needing reliable, accurate flow management. 3) Industrial equipment cooling or process water lines where controlled, repeatable flow is essential.