Highest operational pressure 1. 6mpa, Automatic, Free maintenance, Forging brass valve, Waterproof ip65, Shake, Proof, Energy, Saving, Environment, Freindly, Specification of the timer time interval off 0. 5,,45 minutes discharge time on 0. 5,,10 seconds manual test button micro switch power supply voltage 24, 380v ac / dc 50 / 60hz the largest current consumption 4ma ambient temperature, 40 c Up to 60 degrees Celsius shell material flame retardant abs plastic indicator lamp led indicating power active / inactive specification pertaining to the valve type two two direct, Acting valve in / out port size g1/2 aperture 1. 9, 4mm maximum working pressure 1. 6mpa 4. 0mpa or 8. 0mpa maximum media temperature 90 c material of body forging brass material of seal fkm insulation class h protection grade ip65 voltage ac220v dc24v or ac110v voltage range up and down 10% net weight about 535g