1. No energy consumption, having direct stability of water adjustment 2. The brass casting structure is reliable, wear-resistant, anti-corrosion and precise 3. The pressure regulating valve (constant flow valve) works similar to water flow switch 4. This solenoid valve can not only maintain the constant flow of constant current, but also prevent dry burning and monitor the flow 5. Easy to install and to maintain. Specification: Features: No power consumption, having direct stability of water adjustment. The brass casting structure is reliable and durable, anti-corrosion and precise. The pressure regulating valve (constant flow valve) functions as a water flow switch. This solenoid valve can not only maintain the constant flow of constant current, but also prevent dry burning and monitor the flow. Easy to install and maintain. Specification: Valve Body: Brass Thread Size: 1/2" Weight: 212g Size: approx. 6 * 6.4cm / 2.4 * 2.5in Operating Altitude: 2500m / 8202ft Operating Temperature: 0 - 40 Operating humidity: Type: guide solenoid valve (one-way) Rated voltage: 220V AC Operating mode: short-term quota system Insulation category: E Fluid: Water Fluid: Temperature: 0 - 55 Pressure of water: 0.02 - 0.8 MPa Water Flow Characteristics: Water pressure (Mpa): 0.02, 0.1, 0.3, 0.8 Flow rate (L/min): > >11 >18 >32 Lifespan: >100,000 times Package includes: 1 x water valve (battery not included) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.