Features: No power consumption, having direct stability of water adjust. Brass brass casting structure is and reliable hard-wearing, anti-corrosion and precise. Pressure regulating valve (steady flow valve) function similar to water flow switch. This solenoid valve not just can keep the constant current steady flow, but also prevent the dry burning and monitoring the flow. Easy to install and maintain. Specification: Valve Body: Brass Thread Size: 1/2" Weight: 212g Size: Approx. 6 * 6.4cm / 2.4 * 2.5inch Operating Altitude: 2500m / 8202ft Operating Temperature: 0 - 40 Operating Humidity: 5 > 11 >18 > 32 Lifespan: >100,000 Times Package Includes: 1 x Water Valve(not include battery) Package List 1No power consumption, having direct stability of water adjust 2Brass brass casting structure is and reliable hardwearing, anticorrosion and precise 3Pressure regulating valve (steady flow valve) function similar to water flow switch 4This solenoid valve not only can keep the constant current steady flow, but also prevent the dry burning and monitoring the flow 5Easy to install and maintain.